For classical, Volados playing Schubert is a no-brainer! Great Schubert and an excellent recording as well. Also, Paul Jacobs playing Debussy's Preludes on Non-such.
And, for some thing really different, but very well done, are two albums from Telarc called "A Window in Time" which are music by, or transcribed by, Rachmaninoff and played by Rachmaninoff. They are taken from piano rolls and electronically recreated on a Bosendorfer piano. Excellent music/recording. You wouldn't know it wasn't recorded in a studio.
Sorry, no Jazz reco's. Got tons of it but can't think of any that I would classify as a 'great'(audiophile type) recordings, although some of the performances are priceless.