I'm just ripping my own CD's. I have very few downloaded songs. My collection is not very big (in comparison to other collectors), but I'm up to 34100 "songs" (or tracks) now.
My collection is mainly classical music, and each movement of a work, every aria in an opera etc... is registered as a track.
BTW - in my collection 34100 tracks translates to approx. 190 GB.