Quick question - I want to buy another 320 GB harddrive for my PS3 and then use the stock 80GB harddrive as an external HDD that I can use for my Mac. Is this possible? I know I have to buy an enclosure so that it can be used as another HDD - but is there any specifics I need to look for when choosing an enclosure? NewEgg has some costing $8 and other's as high as $35 .. The PS3's have 2.5" Serial ATA HDD's.