I'm about to build my first rig and the only component I haven't decided on is the GPU. I was going to buy the 570 until I compared it's benchmarks to the 670. But I just can't justify spending 400 dollars on it. How long does it usually take for these things to take a significant price drop? Is it possible for the 670 to be priced around 300 dollars by the end of the year? Or should I just just get the 570 and hope it lasts me for the next couple years?