Oh yes, I have those too
I'm a compulsive shopper. If you get the boxed set you also get
two extra DVDs with him giving master classes on six different sonatas to six different young
pianists, one of whom happens to be Lang Lang. He tries to teach Lang Lang about all the
orchestral textures in the Pathetique sonata. Those master classes were real eye openers
for me regarding Music (with a capital M).
This series of concerts were the first time anyone has recorded the entire collection of
sonatas for video, and he did this all in something like two weeks.
On one of the DVDs after playing one of the sonatas (I think it's the one with the Appasionata)
he almost collapses from the effort. I may edit this last statement when I find the right one