I want to get a new graphics card as I currently play newer games like Skyrim on ultra at about 15 average fps and would like to boost it up to at least 30 fps. I am currently running a GTX 550ti 2gb 900mhz from EVGA and was wondering whether to get anothe 550ti and run it in sli, a Gtx 460 and overclock it or maybe a gtx 560ti