1) Mozart Piano Concertos 20 & 27; Clifford Curzon, piano; English Chamber Orch, conducted by Benjamin Britten (yes, the composer).
2) Schubert Complete Trios; Beaux Arts Trio.
3) Wagner Siegfried Idyll; conducted by Glenn Gould (yes, the pianist). Includes excellent piano transcriptions as a bonus.
Thinking about it, it would be better to choose one of those 100+ CD box sets of everything Beethoven, etc. Counts as one pick, right??