My early 2008 MBP has a 200gb drive that's just about maxed out. I've toyed with the idea of upgrading to a Unibody, but I don't think I can justify spending $2000 right now (not when we're on the verge of new standards becoming main-stream, like USB3 and BluRay). So perhaps upgrading the HD is the answer to my solution. How difficult is it to do? What Hard Drive would you recommend? Would it void the remainder of my warranty (3 months left...)?? If so, would apple even touch it if I needed repair???