Do you really need that much storage right now?
I would get 2 WD raptors 150gb
and raid 0 them and use them for your operating system/games. Then use the 320gb for storage, and when you need more then you can get more later. I mean how fast do you use up storage anyways....1.3 TB
I would get the
and use the step up program to upgrade to a dx10 card later. Unless you just play WoW, then the 7600gt is great but its going to shock on future games like cyrsis.
And you didn't include a case. Do you already have one?