I currently have an xfx nvidia 8500gt video card with 512mb. It doesnt play the latest games as well as i would like. Like on cod4 it looks choppy and seems to be not getting the greatest frame rates. I dont think that i want to spend the money to get an 8800 card so would an 8600 be a good alternative? Can an nvidia 8600gt play games like cod4 and gears of war good on high settings? How much better is the 8600 than the 8500?