ok, you probly can get away with an AS Rock Extreme 3 770 motherboard for $69.99 instead of the Asus 790.
Get G.Skill or Mushkin RAM, just as good as the kingston, but a little cheaper.
DON'T TOUCH that PSU! Its crap on a stick.
Get the Sea Sonic 520W S12II model. Sea Sonic is the most reliable power out there, this is 80+ Bronze efficient and can run your 460 just fine!
Instead of the 460FTW factory overclocked card, consider an AMD HD6850, for about the same price. Both cards will work great.
the 460 needs 2 6-pin PCIe power ports, and the HD6850 needs 1 PCIe 6-pin power. the S12II comes with 1 6-pin, and 1 6+2 pin