For the entire set on CD's I think I'd go for Brendel or Goode. Both have an excellent grasp of these sonatas, and both received excellent reviews. My prime choice woould be Goode.
Another nod for Goode. Although in ultimate terms I prefer Schnabel and Kempf, the fidelity is pretty low on those (1930's and mid-50s respectively) I admire Brendel a great deal, but his set(s) are pretty rigorous and intellectual-- not perhaps the only one(s) to have if you're having only one. Goode is excelllent all around, and is recorded wonderfully. You could live happily ever after.
You must have a verified phone number and physical address in order to post in the Audiogon Forums. Please return to Audiogon.com and complete this step. If you have any questions please contact Support.