yah, i might have to consider the 2GB version. There is only one on newegg right now, but it has good ratings. I hope evga makes one too. OR i could sli a pair of 550 Ti, which doesn't cost much more. However, I don't know if a pair of 550 Ti will utilize the 2GB with the cards combined.
EDIT: yah seems like it's 550 Ti SLI for now, it can definitely hold at high resolution. It even out performs 580 GTX on a few benchmarks.