I have 1 GTX 280 in my mobo and I'm gettin some framerate drops in my favorite games when there is a lot going on (pretty much maxxed settings). When I built my system I bought my GTX 280 thinking I'd buy another one in a year and SLI it. Since then, the GTX 280 has been discontinued. Some horrible luck, so what would you guys recommend that could provide performance similar to two GTX 280's?