Sigh...I thought with the word "own" in the title this would be about physical collections...but from the first post it's all about digital. Oh well.
Digital: about 210-250GB in mp3 ranging from 192 to 320kps
Physical: About 1600 CDs, maybe about 24 vinyls (12"s and LPs)
http://rateyourmusic.com/~sidewinder03