Csmithbarc,
Try the Beethoven Complete Music for Piano and Cello, Schiff and Perenyi, ECM 1819/20 Wonderful music, recordings, and performances! I like these even better than the Ma/Ax recordings.
Also check out Alban Gerhardt's website. You will be able to hear short excerpts from a variety of works. Gerhardt is in my opinion a phenomenal talent whom I hope will be recorded more frequently. I eagerly await his new recording of various Shostakovich & Schnittke works which releases tomorrow.
Also, Jsujo is on target in drawing your attention to the Viola Da Gamba. It is a wonderful instrument, which was used frequently in Baroque and pre-baroque music. This instrument was used to wonderful effect by Heinrich Schutz in his choral music for those that appreciate such music.