I am in process upgrading my hdd's. I have 2 different 500gb hdd's i am gonna put into a new htpc build. what i am wondering is what should I put into my gaming rig? Should I get say 2-74gb raptors and raid them or should i go with one 32mb cache 7200rpm? If I am just going to really install games on it how large should I go? Think 640 wd black over kill? Should I shell out $10 more for the 750? Heck the egg has a 1tb for $109.