Hey guys! Nursing school begins soon, and I'd like to have a desktop in my room just for me. I think I am dead set on either an x2 550 or x3 720. This will be used for basic usage, although some Steam games and WoW, and DVD movie backups. No crysis, farcry 2, or anything like that. I would like to spend as little as possible, and I'm starting from scratch, so I will need all components. You guys are the experts, so tell me what I should get!