uhh well they have to be in the same price range or there would be no nagotiation here so i would go with the evga 6600gt. but if i were really u i would save and wait till u can afford a 6800gt or up. my 6600gt is starting to get lower frame rates in newer games so i would wait. im actually thinking bout getting some sli action goin on with the 2 6600gt's but thats a ways down the road gotta see how the fear game runs.