One of the things I like about the case I picked, is that it's got a blow hole on top(with fan), vents on the side, and a fan on the rear of the case. Besides, I'm not completely sure about the earthwatts 500w anyway. My other choice is the 520hx, which I realize is a bit more expensive, but I understand the corsair PSU's are better quality.
If that's the case with the Xeon cpu, I think I'll see if I can get my grubby hands one one of them, instead, assuming the E8400 isn't stocked again in the next few days.