I grew so tired of seeing continuous news about delays that I bought a GTX 560 Ti as a temporary solution for Skyrim.
Hmm... well, in that case, I might just get 2 GTX 460s and put them in SLI, I've been looking at performance comparisons and two 460s pretty much match a single GTX 580 and are still cheaper. But i'm not sure if i would need more power than 600watts.