You think so?? I can afford the GTX 680, but i wanted to go for the Sapphire HD 7950 3GB Dual Fan.
But i might go for a nvidia 570 or something, apparently AMD drivers aren't always very well functioning.
I honestly do not see the point in spending that much money on a video card, but its your computer.
Buying a substantially expensive card with the intent to "future proof" your computer is folly. Buy something modest that meets your needs today, and worry about what will meet your needs in 3 years when you cross that road, its more economical.