Change your graphics to this:
Newegg.com - EVGA 640-P2-N825-AR GeForce 8800GTS 640MB 320-bit GDDR3 PCI Express x16 HDCP Ready SLI Supported Video Card - Retail
The difference between this and the GTX will not be noticable, but the price between them will. If you look at the specs of the 2 cards, this card is just barely behind the GTX. it can save you over $100 and you will basically get the same performance out of it.
A good place to check your components is Tom's Hardware - Computer Hardware News, Tests, Ratings and Reviews
they have CPU and VGA charts, so you can see how much of a difference each thing will make.