I really couldn't tell you. Anyone know how the wii/360 guarantees them? From what I understand, Wii doesn't allow redownloads, which means you are basically screwed. And the 360 you have to contact MS about redownloading, and they give you a silver account which you sign into and redownload. If true, MSs sounds the best. It's a pain to redownload when you have to, but it would definitely cut down on 'sharing' and, chances are, most people don't need to redownload lost files anyway.