Just bought a SSD (Samsung 830, 256 GB) for Replacing Main Drive. I plan to buy a caddy and a 7200 rpm for the optibay (Don't need the DVD Drive). Do I have to buy a Sata II or III HDD? Seen these so far: Seagate Monumentus (SATA II,III available) WD Scorpi Black Sata II Something to look at by buying a caddy? I have the new Mid 2012 MBP (Non Retina). THANKS!!!