The fact is, hard disks don't have anything to do with "on-demand" data. Levels might load faster, but that is it. It is the same way with PCs where faster hard disks and RAID do nothing but load levels faster. Devil May Cry 4 as I mentioned required 20 minutes of HD installation on the PS3, yet the 360 version was smoother. Hard disks are for storage only not improving in-game performance when everything is loaded. If you are going to be storing lots of things on it, isn't MS bringing a 1TB 360 later this year? ... along with that helmet and the wood panel 360?