For the sake of tossing three out there which I think are great and are currently at the top of the "recently played" pile (and which have tended to stay up there despite owning them for a few years...)
Classical
1) Benjamin Britten - Suites for Violoncello, played by Peter Wispelwey (Channel Classics)
2) Prieres sans Paroles - French Music for Organ and Trumpet Hardenberger & Preston (Bis)
3) Bach's Goldberg Variations, played by Glenn Gould (Sony)
And Three Jazz Favorites (I know, I'm cheating)
5 By Monk By 5, Waltz for Debby, Cookin', and all the others I can squeeze into 3 jewelcases after I take the innards out...