Ashkenazy over Richter!!!
Anyway, I prefer Garrick Ohlsson for the sonatas he's done,
BUT for the full set, Alfred Brendel wins no contest to me (although, I wish Ohlsson did a box set, i'd buy them in a second, he's my favorite)
For the Hammer Klavier, Ohlsson is just incredible, and Charles Rosen is great as well
I'm so surprised that there are some Brendel haters here.