Ah. The mazurkas were the problem.
There are equally good Michelangeli recordings of the fantasia in f minor (12 minutes) and the sonata in b flat minor (25 minutes). They are old and mono. But if you don't mind that (I don't), and if you're into longer pieces, you may find them worth checking out. (Personally, I think length doesn't matter; what matters is what you make of it. I think that in other areas of human intercourse, too. But I digress....)
Speaking of longer pieces: The longest ones Chopin wrote are the concertos. Here my favorites are Artur Rubinstein / Bruno Walter for the first, and Alfred Cortot / John Barbirolli for the second. Again, the recordings are from the thirties and fourties, which I consider the golden area of classical music interpretation. (Present recordings just don't measure up -- it's part of why I'm a cultural pessimist.)