Beautiful Classical Smaller Pieces, duo,trio,etc

The Julian (Bream) and John (Williams) guitar duo albums are great (Assad Bros. duo also excellent).
Violin/Piano: I like the Prokofiev Sonata #2 (originally flute) and the Saint-Saens Sonata #1.
String Quartets: Debussy or Ravel (Guarneri has a fairly recent high-quality LP of the Ravel w/two movements per side).
String Quintet: Schubert Quintet in C--give me heaven before I die

Shostakovich string qt. #8--powerful stuff with some moments of beauty, albeit ominous