Put more money into your hardware, and less into your case. Nearly 200 bucks is way too much money for a case.
Also, get around $600 or $700, then come back here and consult us, because newer, faster parts are always released, and by the time you have that kind of money, the parts I've listed may not be such a good choice anymore.
Intel C2D E6320 / AMD Athlon X2 3800+
Gigabyte 965P DS3 / DFI nF4 Ultra-D
2GB OCZ Gold PC2-6400 / 2GB OCZ Gold PC4000
eVGA 8800GTS 320MB / eVGA 6800GS 256MB
150GB Raptor / 74GB Raptor
2x500GB / 320GB
OCZ GameXStreme 850w / OCZ StealthXStream 600w