Any reason for going with windows 8 pro over windows 8.1 (non-pro)? If I were you, I would try to squeeze a gtx 780 into that build, especially since you are going to be gaming at 1440p. Also you will not notice the difference between 1600 Mhz ram (CL 9) and 2400 Mhz ram (CL 11), last time I calculated the difference it was something like 2 nano seconds. You can probably find some 1886 cl 9 ram for a bit less and would actually be about the same as the 2400mhz cl 11 ram
Good build, high speed RAM is pointless and PSU is overkill unless you plan to add another Graphics card... try this build: http://pcpartpicker.com/p/3i5HI
Also, why are you asking for help if you've brought some of the parts?