I'd love some opinions on the 100GB @ 7200rmp versus the 120GB @ 5400rpm. My initial reaction is to get the faster drive, since needing more space has never been an issue for me. My top two questions are: 1) will I even notice a difference between the speeds? and 2) will the speed increase exacerbate any pre-existing heat issues? Edit: the most intensive programs I run are some online games, for which I want the dedicated graphics and why I'm looking at a MBP (17") rather than a MB.