Mozart Piano Concerto 21.

I also own the Lipatti, which also has a nice performance of the Schumann concerto. I don't mean to knock Schiff too hard. I do like his Bach interpretations.

For #21 you can't go wrong with Murray Perahia. He has recorded it more than once. Try the one with the Chamber Orchestra of Europe with him conducting from the piano. It is on Sony Classical SK46485
(Comes with Concerto #27)

On LP record look for the one on Columbia Records with the English Chamber Orchestra. Album number M34562

I will ditto the Curzon recording. Curzon is my favorite Mozartian pianist. But the recording I have is with Kubelik and the Barvarian Radio Symphony. I did not recommended it figuring the Perahia with modern CD sound would appeal more to audiophiles. I am a music lover first and I care about the performance 99%. The high end audio just makes it sound as good as possible.

For Schiff I hope it is newer recording. I never thought Schiff had "got it" as far as Mozart when he was young. I found his early attempts at Mozart competent but unremarkable, including the time I heard him at Tanglewood years ago. I do find as he has matured, his Mozart has matured as well!