If you plan on adding a second video card later, you would need a bigger PSU. Something in the 750 watt 80 Plus Bronze range from Corsair, Antec, Seasonic, Silverstone, OCZ or XFX.
Also, since it looks like you plan on overclocking the processor, you might wish to get 1600 speed ram to give yourself a little wiggle room there. The GSKill RipJaws is very popular and the heatsinks will not interfere with the cooler. The value series will work as well.