Do what thou wilt shall be the whole of the Law.
I was going to suggest to you for the first time you listened to Op.20 to light some candles and pour a couple of glasses of wine for you and your husband, then listen to it ... but wasn't sure if you would like Scriabin's Concerto so ... It is just absolutely beautiful - truly one of the most beautiful songs ever written (if played correctly

).
Not only is the Piano Concerto beautiful, but it's also one of Scriabin's most difficult pieces to play correctly, he uses a lot of subtle polyrhythms throughout the piece. Unfortunately many pianists just do their own editing job and replace the written rhythms with their own 'simplified' versions.

Sometimes it makes me roll my eyes so much, my eyes hurt!
Also about the Prometheus ... since you've listened to both versions, go back and listen to just the first three minutes of both versions side-by-side. This will demonstrate to you the vast difference that it can make in someones interpretation of Scriabin's music
I don't think Scriabin's style or approach changed as much as most people think. Even up to the last of his compositions you can still find the deep passionate romanticism - it's just that if he had written something based on (say for example) the whole-tone scale, then Scriabin would immerse himself totally into the tonality of the whole-tone scale to find that same kind of passionate expression. However, if someone totally ignores what Scriabin wrote, then all phrasing, all dynamics, all touch and tone, all rhythm, even all melodies tend to get lost into a swirl of dispersion. Enough on that, since I'm starting to repeat myself, I think.
As for your dreams... it might not necessarily be the Scriabin music that's the cause of the dreams. A lot of times Scriabin's music can serve as a catalyst to bring out deeper subconscious issues, since he dealt with deep issues that spring from the subconscious. To demonstrate what I mean, try this little experiment (you may have done this before so humor me) ...
Go to your piano (it should be an acoustic, since it's important that the strings are able to vibrate freely), and without playing any notes press and hold down the sustain pedal (the right one). Now, while centering the tone as well as you can, sing out loud a single note. If the tone is centered upon the same pitch to which your piano is tuned, when you cease singing, the note should begin to vibrate the strings on its own. If not, then try again singing the pitch slowly higher or lower until you achieve this affect. You should notice that the note will cause the strings to vibrate fully when the pitch is sung at the same Hz to which the string has been tuned. If you continue in doing this exercise and get really really good at matching the exact pitch, you might also begin to be able to vibrate some of the strings for the harmonics of the tone at the same time (while singing only the single pitch).
... now (with this in mind), Scriabin's music can have a tendency to act in the same manner. Actually any composer that delves deeply into emotional subconscious strata will have a similar effect. The difference is that Scriabin immersed himself so completely that hearing his music played correctly will have a tendency to cause the 'strings' of your subconscious urges, issues, feelings to vibrate. If the performance is REALLY good then some of the overtones/harmonics might begin to vibrate as well.
Now that I've given this long-winded explanation for what I mean, let's get back to the subject of your dreams. The fact that you're having nightmares of late is indicating that there is some aspect of your life that's not quite right with you. You don't have to tell me (or anyone else for that matter) what is the issue, just try to make yourself aware it. This issue doesn't 'sit right' with you, and your subconscious mind is presenting that issue as a horde of giant monkeys chasing you. If I was having this dream, it might possibly be a Darwinian reference to the masses of humanity, and their ideology, or something along this line. However (and this is actually really important to understand), if you normally don't utilize and think about Darwin or evolution (etc) then this symbol (monkey horde) might mean something totally different to you (you did mention 'The Wizard of Oz', so that might be a good place to start analysis).
This is what you should strive to understand. What do these symbols represent to you? Was the large house unknown to you, or had you been there before in previous dreams? What feelings did the house give you? Was it spooky, or elegant, or decrepit, etc? Think about the seasons. Was the dream in Winter, or Summer? What do these seasons mean to you? Spring usually means love to most people, whereas Winter usually means Christmas/Solstice/Saturnalia/etc and holidays to others. It is this collection of individualized symbols that your Higher Self is utilizing to attempt to make you "sit up and take notice" of some important message. Usually the more vehemently a dream
affects you, the more important is its message.
One excellent source for further exploring some of these concepts is from the book
Liber Aleph: The Book of Wisdom or Folly by Aleister Crowley, the Beast 666. He writes a few interesting and fairly clear sections upon the subject of dreams and dream interpretation. You should notice that these 'occult' interpretations of dreams are not dis-similar to psychological interpretations (cf. Sigmund Freud's
The Interpretation of Dreams, or Carl Gustav Jung's works concerning the projection of the archetypes). I've posted two links which should lead to the same book in different formats. The first is a .pdf file that you would need Adobe Acrobat Reader to look at, the second can be accessed from any web browser. The .pdf has a table of contents with it and can be downloaded to your computer (by right clicking on a PC, etc - I think you know the procedure), whereas the .htm version is listed in long pages with chapters separated into groups. You should especially look at the sections/chapters that refer to dream interpretation which I've listed below each link.
Liber Aleph - pdf version
9. HOW ONE SHOULD CONSIDER ONE’S NATURE
10. ON DREAMS (ACCIDENTAL)
11. ON DREAMS (NATURAL)
12. ON DREAMS (CLOTHED WITH HORROR)
13. ON DREAMS (CONTINUATION)
14. ON DREAMS (THE KEY)
15. ON ASTRAL TRAVEL
16. ON THELEMIC CULT
17. ON THE KEY OF DREAMS
Liber Aleph - htm version
This version uses the original chapter titles (Greek letters with Latin Titles), so the sections would be under "Chapters alpha-omega". You can also search on "Somniis" which is "Dreams" in Latin.
{theta}
QUO MODO NATURA SUA EST LEGENDA.
... through ...
{pi}
DE CLAVICULA SOMNIORUM.
Let me know if you care to discuss the dreams any more or if you have any questions about the 666 materials, or if you just want to vent/etc. I'm rather enjoying our conversation here.
Love is the law, love under will.
Aryobrand
P.S.: Scriabin wrote his
Second Piano Sonata, Op. 19 right before writing this and it is similar in style ... (although someone has already recorded it for Piano Society so you might want to contribute a Piano Sonata that nobody's recorded, yet. - I'm currently working on No.10 when I have time to practice (about once every two weeks

))
P.P.S.: The phenomenon of sympathetic vibration can be demonstrated with echoes and the like as well. When I was last in Pisa, Italia, there's a cathedral there whose acoustics are so 'precise' that you can sing a single note, then when you release that note it sustains for a while and you can sing a different pitch, and another, and another. In this way you can get whole chords going at the same time - singing by yourself!!! It's an amazing phenomenon.