I think you meant better quality or more fps (better performance) in your topic.
Either way, it's nice to have both, if the price isn't too high.
But for me performance is greater than quality if the quality difference isn't too big (if lowering game settings to lower resolution and lower quality for a sake of 5-10 fps at an already stable 30+ fps game, I'd choose quality, on the other hand, if I'm running a game at a constant 15-30 fps, I would prefer to get the extra 5-10 fps).
The RV670 and the G92 are both speculation at the moment. I would say, save your conclusion until both cards along with their prices and benchmarks are available. It should be soon, so hold your horses!