I have a macbook pro mid 2008 core 2 duo. I want to get an external hard drive, and am having trouble deciding between a usb2.0 and a SATA - my machine has a pciExpress slot, so I was thinking about getting a card with SATA ports. My big question is, which will be faster fore real world transfer speeds? usb 2.0 or the SATA? Thanks guys!