$180 for an 8800 Ultra? Sounds good, if you think it was $800 a year ago. Sound bad, if you think that the $150 HD 4850 is faster. Well, anyway, it's a good card and good bang for the buck at this price. My BFG 8800 GTX OC2 is about the same speed and it's still doing just fine at 1680x1050.
The NeoHE 430W has 32A combined. It should be fine.