My old 20gb HD is just not enough these days. I can get a 120 gb HD pretty easily, but I want to know if there's anything I should be aware of first. I don't think I'll really need to transfer any old saves from old HD. If I want to play older saves I figure I can pop in the old hard drive. I believe that I will need to reauthorize my new HD for my XBLA games and other digital purchases. Does anyone have a link to where I can find out how to do this? Aside from these issues, is there anything else I should take into consideration?