Hi There Meepz. That card recommendation is for your entire system, not just the card, and includes a healthy safety margin. The other parts dont use nearly as much as the GPU. You could get away with less, but I would suggest you shoot for the 700-800w range.
That said, in a high end system that might be overclocked or etc in the future, I see no reason not to aim a little higher. The PSU will run most efficiently with a little bit of extra room.
These would be excellent choices:
SeaSonic S12G-750 750W ATX12V / EPS12V 80 PLUS GOLD Certified Active PFC Power Supply, - $109
http://www.newegg.com/Product/Product.aspx?Item=N82E16817151138
Seasonic SS-760XP2 ATX 12V/EPS 12V, 760W, 80 PLUS PLATINUM Full Modular certified Active PFC...