I am thinking about upgrading my Macbook's hard drive. It would be greatly appreciated if someone could steer me in the right direction. As of right now I have the 2.4 ghz Macbook (black) with 250 gig hard drive and 4 gig of ram. If I were to upgrade to a 7200 rpm hard drive am I going to going to notice a difference in the speed? And by doing so will this create more heat and noise? Space isn't really a factor for me so much as I am looking to make the machine run a little faster. Then my last part is, what would be a good recommendation for a reliable hard drive, I know there's Western Digital, Seagate, Samsung, Hitachi a few more to choose from probably. Thanks in advance!