Much as I love owning physical CDs, it is easier to do digital downloads, uses less resources (a good thing to consider during Earth Day), and I always rip my CDs anyways for use on my PC.

The only caveat I will say is that any digital download that is crippled to only work on the PC you download it with is NOT acceptable, since I usually have one PC for my downloads but move the file to a differet PC for storage and use.

I also prefer to not have to connect to a specific server every time I want to play the file since servers do go offline. But I find the "only usable on the downloading PC" more annoying of the two DRM schemes.