Joe go for a 6800 GS that will be future proff it can handle the new games flawlessly and its really not expensive here is a link http://www.newegg.com/Product/Product.asp?Item=N82E16814130267
The 6200 and 6600 series can run HL-2 on full dont know how they do it but i think Source Engine owns it doesent demand a lot and it gives candy eye graphics but FEAR will run on low or med with the 6200. Thats my advice go with the 6800 GS just put a little more cash