Your Favorite Classical Box Sets

Bartok, The String Quartets, Juilliard Quartet, Columbia1960's stereo
Beethoven, Complete Quartets (three sets--early, middle, late) Guarneri Quartet RCA

Treasury of light classical music.   Readers digest

I have several versions of Beethoven's Fifth Symphony, my favorite of all of them, #3, #7 and #9 are near the top of my list.  If I had to chose "the best" I'd chose Herbert Von Karajan's 1963 recordings with the Berlin Philharmonic (remastered).  I may change my mind on that, after the George Szell/Cleveland Orchestra set arrives though.