Hi. Need some advice from those who'd know better. Would I see any real-world performance increase upgrading from two GTX 470s to a GTX 6xx series GPU if I am limited to using a single 22" monitor setup? A hereditary eye condition limits me to using a 22-inch monitor at customized 1680x1050@75Hz resolutions. Anything bigger and I get skull-splitting headaches and nausea. Unfortunately, a multi-monitor set up is out of the question, as well, as pretty much the same thing happens. I presently have two GTX 470s hooked up to an old Samsung monitor that can be forced to do 1680x1050@75Hz (77Hz maximum). The Fermis are holding up surprisingly well with it. I can still play all my games at the highest quality and -- for the most part, get a solid 75 FPS -- provided I stay away from problematic drivers. I'm nonetheless considering an upgrade to a single GTX 680 GPU. Would this be a sensible move or a rookie mistake? A friend has told me that -- given the limitations of my eyesight, and since the 470s are working out so well for me -- I'm better off waiting another year before I upgrade. He told me the price of 6xx series cards would be somewhat lower by then. So am I be better off planning other upgrade paths for now? Thanks in advance for your advice and opinion.