Is it a gaming computer? if so:
1. reduce the CPU to i5 2500K.
2. get a better HDD (Western Digital Caviar Black 1TB as my preference).
3. get the best video card you can afford. (6950, 6970, 6990, GTX570, GTX580)
yeah its a gaming rig. will an i5 be able to handle crysis? i mean i realize that something like that would depend more on the video card. but cant a cpu create a bottleneck too?