I'm looking to upgrade my rig's storage. It's a gaming rig, and currently has a 500gB 7200 RPM Toshiba. It get's full quickly. (due to large games like Skyrim and Fallout) I want the total price to be under $200, and would like a least a tB on the HDD, and enough on the SSD for the OS and a few frequently used programs/games. I'd also like to keep using the old HDD, if possible. Which HDD and SSD should I buy?