I am buying a 13 inch MBP when the BTS starts. I want to upgrade the hd of the base model but not sure if I should have apple do it, or do it myself. I have never owned a mac and have also never upgraded a hd before (I have upgraded RAM on my laptop and desktop). Which website is reliable to get a hd? Any links on instructions in how to do this? By the way apple is charging me $135 to upgrade to a 500 gb 54,000 rpm drive but I kind of wanted the 72,000 rpm drive.