I really wanted to buy this game, but I'm not going to reward a company with my business who puts obnoxious DRM into their software. The idea of a single player mode really interests me because sometimes I'm off the grid and I want to still use a laptop or netbook. Requiring me to be connected to the Internet for single player mode is something I'm not going to accept. I've been waiting for many years to play this game, but I'm not desperate - there's lots of fish in the sea.
Now ... someday when they take the DRM out ... maybe I'll change my mind.