Both nVidia and AMD are going to ship their next video card generation (the 880?) next year on 20nm. Wow, what a tough time to be buying cards. It sounds like, if you can wait, then you might want to see that turn of the crank.
Rumor is less power required and maybe cheaper. That plus we are seeing the transition to 4K monitors, makes it a hard time to be buying things particularly with DisplayPort 1.3 on the horizon next year.
So if you hang on, please hang on