So right now I'm looking to replace my gaming rig's graphics card, and after some advice and looking at reviews I've settled on either http://www.newegg.com/Product/Product.aspx?Item=N82E16814125443 or http://www.newegg.com/Product/Product.aspx?Item=N82E16814125418. They're not the greatest, but $240 is about as far as I can go. I'm currently using an old EVGA gtx 460 and wondering which of the two (or any other cards in that price range I missed) offers the greatest increase. Any help would be appreciated. I have an Asus Rampage 3 Formula mobo, 6GB of ram, and a 950w psu in case that matters.