all but 10 or so tracks of the 20+ GBs I have DLed is from Emusic - usually just buy LPs now (goodwill or other sources) or a very rare CD.
My biggest reason not to touch the P2P files is the overall shoddy quality - I am very picky when it comes to formats and quality. I find it much easier to buy the CD - or borrow it from a friend for a short while - and rip to flac or ape for archiving. If it is good I will buy it myself first before ripping. The last time I paid for music (last month) was for a live concert from
livephish.com in the glorious flac format.