I'd recommend an AMD graphics card simply because they are cheaper and can outperform the Nvidia ones.
The 7970 is comparable to the 680 yet it is cheaper than the 670, huge difference!
The 670 FTW operates close to the 680 (sometimes beating it (Signature 2?) ) for the same price as the 7970.
Have they fixed the 7900 series issues with 13.1 or 13.2 ? I heard they were.
Edited by RodgerM - 4/27/13 at 12:14am