I have heard the Zimmermann as well, and though I am struck by the
uniqueness of it, and there are some exceptional moments, I still prefer
Argerich with Rostropovich for No. 2 and Garrick Ohlsson with Kord for No.
1. This doesn't mean I don't enjoy other Argerich or Ohlsson or Pollini
recordings! But as I write this, I find myself recalling the wonderful
Rubinstein recording from my youth which I have not yet purchased on CD.
Best,
Paul Hofreiter