Hanson, Symphonies Nos. 1, 3, and 5 / Piano Concerto / "Merry Mount" Suite / Lament for Beowulf
Gerard Schwarz, Seattle Symphony and Chorale, Carol Rosenberger (piano, Concerto) (Delos)
I'm actually making my way, intermittently and somewhat out of order, through all of them now. I'm still a physical-product guy, so I take 'em one CD (or CD-set) at a time. It really is an amazing body of work--for Papa Joe, for the Auryn Quartet, and for Tacet!
Nielsen, String Quartets Nos. 1-4 / Andante Lamentoso for string quintet ("At the Bier of a Young Artist") / String Quintet
Kontra Quartet, Jan Johansson (double bass, Andante), Philipp Naegele (viola, Quintet) (BIS)
If you watch it on Netflix, you might want to turn on the closed captioning. It identifies every piece of music used in the score, including the composer--more often than not, Bernstein himself.
^ Now THAT'S a coincidence--now playing:
Brahms, String Sextets Nos. 1 and 2
Talich Quartet, Michal Kanka (cello), Josef Kluson (viola) (La Dolce Volta/Calliope)