I currently have a 120 GB hard drive on a SR MacBook that I'd like to upgrade. I was curious if anyone could offer me some recommendations on which hard drive I should purchase. I feel I should stay at 5400 rather than 7200. I think space is the better option rather than speed and supposed decreased battery life. I'd love to purchase off of Newegg and get my upgrade going right away. A second question is can I use my Time Machine backups to reimage the new hard drive?