Stravinsky OP. 7 and Chopin Posth. are definitely your best bets.
Chopin posth. what? There are a few posthumous pieces you know I thought through most of Chopin I thought... If you are thinking of Fantasie-Impromptu for some reason, I have played it.
#2 (Stravinsky) is murder; it's why most people avoid playing the complete set.
But you're not speaking from personal experience? I played that etude at uni (the only one of the four I studied), and surely if I could manage it, you would never have a problem.Once the cross-rhythms are sorted out -I put in much hands separate practice- it's great fun. I'll admit, though, that I did not get it quite up to Béroff's speed.
There are only a few posthumous chopin etudes. Shouldn't be hard to find them. Given your thread title, I would assume that you were looking for etudes.
Oh, I was a bit confused since I didn't understand what pieces you were talking about. Well, I have played one of those etudes, and checked out the others. Those are good, but they hardly deal with cross-rhythms 5 against 6. Thanks for the tips anyway, I will check out all the pieces you have talked about.