Looking for well recorded great piano on CD's

Try the Stereophile Magazine recordings, they are super clean and bring out the best and worst of your system.

I enjoy Stereophile's boxed set of Beethoven's sonotas. Should be a link and review on their site.

All of the SACD hybrids from Bill Evans are worth owning.

For jazz piano I would recommend these:

Ahmad Jamal, "Cross Country Tour"

almost anything by Bill Evans, especially "Sunday at the Village Vanguard"

early McCoy Tyner

Billy Taylor, "Ten Fingers, One Voice"

I enjoy George Winston, "Plains" is good.