If you want to expand in the future, I'd suggest getting the PSU.
Better build quality, based on the Superflower 1300 watt PSU which is actually platinum rated. A lot cheaper and more wattage.
Just noticed you chose a 2x8GB kit. I'd suggest switching to a 4x4GB kit since you are using a quad channel board.
I'm personally looking at this kit, but the 2x8 version since I'm on dual channel board.
vs the quad channel version of the ram you chose.
The timings on the 2400 are a little bit higher than the kit you chose, however, it's also a healthy bump in Mhz, too.