I was thinking about getting a GTX 670, been waiting forever for the ASUS GTX Direct CU II Top card. I was looking at alternatives for around that price point, I'm considering even Crossfire/SLi setups. I was looking at GTX 480 Sli, but my Corsair TX 750w 80 plus bronze certified would be peaking out with those I think, what do you guys think? Can anyone offer me a solution for around $450 that would give me better performance then a 670/680? and work well with my power supply? GTX 470 SLi?