I currently have the following hard drives: 3.5" 80GB WD Blue from my old desktop to be used as Linux boot drive. 2.5" 750GB Seagate Momentus XT (7200 rpm Hybrid SSD + HDD) that is currently in my laptop. 2.5" 640GB Hitachi (5400 rpm HDD) that originally came with my laptop. It's currently sitting in a box on my shelf. ________________________________________________________________________________________________________ In my build I plan to buy a 128GB SSD for Windows and a few programs/games. Below are some configurations I was thinking of: A. 128GB SSD boot + 640GB Hitachi for storage B. 128GB SSD boot + 750GB Seagate for storage (and put the Hitachi in my laptop) C. 128GB SSD boot + 1TB Seagate Barracuda (which I will have to purchase) for storage + 640GB Hitachi for extra storage