I have decided to keep my old macbook pro and upgrade the hard drive rather than buy a new macbook. Where is a good place to buy a bigger hard drive to replace the small 80 gb hard drive. I would like to buy one in a kit with the enclosure. Also should I buy a 7200 rpm drive or 5400 rpm drive. What are the pro's and con's. Also should I get one that transfers buy firewire or usb. any help would be great.