Spiffnme:

If you like the cello you must try the Bach Cello Suites -- Fournier on Archiv or Starker on Mercury have both good sound and sound (pun intended) performance.

For 19th century, you may want to try Brahms' chamber music (Piano Trio #1 and String Sextet #1 are my favourites) or maybe some of Dvorak's (Piano Trios, some of his late string quartets, etc.)

Good luck.

P.s. It was me who posted that wanted ad on agon, but I replied to the wrong address