I'm currently running a single gtx 960 ssc from evga and I'm looking to upgrade now, I'm not looking to upgrade to the 1070 or the 1080 as they are out of my price range at the moment. Should I buy another gtx 960 and sli the both or get a single gtx 970 and sell my gtx 960 I'm gaming at 1080p and I'm not looking to upgrade after that until a 1070 is under £300