So I've been researching for months now and I've pretty much decided every part for my new build but the GPU. I am going to be gaming at 5760x1080 which is the only reason this is a difficult decision. Will it be absolutely necessary to crossfire or SLI to have a pleasurable experience at this resolution without buying a titan or could I get away with a 7970 GHz / 680? Any input is appreciated, thanks. Really hard for me to justify spending more than $700 on a GPU(s) right now but what would YOU get for eyefinity/surround gaming?