Would be useful to know what your main use for the PC is. You have a high end GPU plus an equally high end mobo,so that would suggest a gamer? What O/S 32BIT or 64BIT?
A decent 550W - 650W PSU should be more than enough,unless you are planning tri-SLI in the future with that mobo.
If you are not overclocking then the stock heatsink will be fine, but something like a Corsair H80 CPU Cooler would be good.
Do not forget thermal paste needed for CPU/Heatsink.