I agree with DarkSable that going air for a cpu heat-sink-fan would be the better alternative. Imho, unless you're a seasoned pc builder, water-cooled hsf's might be more trouble than they're worth.
If you plan to add a second video card later, that PSU won't be enough, but if you're going with just one video card, then you might consider one with a lower wattage, preferrably in the 500W range. SeaSonic, XFX, Antec, and Corsair are good brands.
Asides from that, you've got a sweet build. Good luck!