Since the announcement of iTunes PLUS, I have decided not to buy any music from iTunes which are protected by DRM. And I did have bought some iTunes PLUS music. Anyway, I had over $50 store credit I have to use, or it is nothing because I cannot get refund from iTunes for store credit.
However, sometimes it is much cheaper to buy used CD. Some used CDs can be as low as $0.99 + $2.99 shipping. And you get the physical CD and, most of the time, CD book/artwork. And you can put these as decoration at home, as well as showcase for your music taste. So, why not? It is definitely good.
However, compared used CD to eMusic, I would still download from eMusic because it is even cheaper. Faster.
Still, I have some collection of CDs that I am proud of. What I need now is a CD shelf, artistic one.