ATI HD 5770 is even a better card than Nvidia 430, and it still has serious problems when running DirectX 11 gaming. But oh well... some people are just posting to increase post count, get points, and be clueless about mostly anything. Of course the price for the 5770 is more than double the price of the 430, and it still has trouble running Metro 2033 decently. So listing the 430 as a viable card, is just sheer disinformation. Maybe cheap, yeah, but that's all there is to it.
You guy are crazy! U want to use 580 on a small monitor lol. The guy has 18.5" monitor which usually support 1360 x 768 resolution.
So if you want to play with all eye candies on you need at least 5770 or use 5670 for med details. This is sufficent for ~720p resolution.
By the way, 6950 plays Metro with all eye candies on, with few hiccups here and there at 1920x1200. Anyway, for smooth responsive play at 2560x1600 SLI or CF is a must.