I've looked for 500GB 7200rpm drives on ebuyer and it has given 8 results, 5 of which are Seagate drives, and of those 5 drives 3 of them seem almost the same. Each is 500GB, 7200rpm, and has a 16MB cache. The only difference I see is in the "Features" section on the specification page, but I have no idea what any of that means. There is also the Western Digital at the bottom of the page. So of the 3 Seagate drives and the 1 WD drive, does anybody know which of those would perform the best in a MacBook? Or would there be no difference?