How many amps are on the 12/v rail on that Antec PSU?
What resoultion is your monitor?
I think as it is your Quad core @ 3ghz will bottleneck anything higher than a 6870.And I have doubts about it not bottlenecking it.I think the 6870 is the best you can get for your money.It's faster than the 550ti and GTX560.The 6870 is more on par with the GTX560ti but it's $50 cheaper.
heh hard to find a graphic card at a decent price when i expect to build a supercomputer next year .... maybe the 6770 or 550 ti would be better options since i only play call of duty and hon... what do you say about power supply? what psu is decent .... and do i gotta look for a certain amp on 12v?