I know this thread is a little old now.
But I thought Id give you guys my final choice now. With the released specs and performance of the 770's and 780's, I am completely skipping this generation and just going to SLI 670 4GB's.
The 770's have the same memory bus and only 2GB's of VRAM?!?! totally not worth it at all when you can get the same tech for cheaper and more VRAM (even though it doesn't have the horsepower to fully utilize the full 4GB's, but neither does the 770) All it does is clock a little higher on the memory, which I can do without. It only makes about a 5-10% difference in performance. There is no reason for me to pick up a pair of those cards. I really believe Nvidia has let the world down with this generation. They have seriously disappointed me and I am completely skipping this generation.
Thanks guys for helping me make this decision.