Yes, Barenboim is a very fine piano classes
. Not sure why he hasn't recorded any Rachmaninov. Maybe because he (Barenboim) is not a charming man? I know that sounds silly, but I know he's not the most charming/romantic/dramatic man on earth from observing his time as principal conductor with the CSO. Perhaps he can't relate to Rachmaninov's highly dramatic music? Who knows....I'm just taking a wild guess here...
^ +1. That' what I thought so too. But also, here is what I think what Barenboim mindset is. and I quote, well from what I read:
"Struggle, Beethoven is all about struggle," Barenboim says, spitting out the last word with a guttural force to match its meaning. "With this greatest of composers there's always resistance, battle with his own visionary torments." He slices the air with both hands, clenching right fist over left in imaginary combat to illustrate his point.
"There's never mere virtuosity for its own sake. Unlike Mozart or Chopin, Beethoven doesn't flow. You need to push him or pull him and sometimes he just stands still, stubbornly."