How about
Smetana - Ma'vlast
Glinka - Quintet, Russlan and Ludmila
Nielsen - Aladdin Suite
Khachaturian - Concerto for Flute
Beethoven - Trios, Variations on a Swiss song, Sonatas
 - these would be the obvious suggestions.....since I'm at this stage
too....ohhh I heard this piece yesterday Fibich's Quintet for Piano, F
Horn, Clarinet, Violin and Cello and fell in love - but I haven't been
able to find out more the piece - not yet anyway.

Good luck collecting....

cheers,
anu