Work one extra day, mow one more lawn, wash one more car......
Really dude, save just 60 bucks and get yourself an 8800GTS 320MB. It is significantly faster than any card for 200 bucks. Its almost 2x as fast as the 8600's for only 60 bucks
For a couple of comparisons........Same rig, minues the video card....
7950GT 512 Superclocked then OC'ed to something high, I forget what it could do, but it was quite high. It also had a VF-900 on it. That card netted me 6800 3dmark 06. With the 8800GTS 320, I net over 11,300 3dmarks.
8800GTS 320 = 11,300
7950GT 512 = 6800
The extra 60 bucks will be the best 60 bucks you can invest in your computer if your nig in games