Yes, it would run CS:GO.
Yes, and btw most people around here like to use PCpartpicker. (http://pcpartpicker.com/) It is very nice :)
btw, go with a caviar blue 1 tb drive for ~$50. Much better. And if you aren't overclocking, a i5 4590 (non-k) will perform the same and be cheaper.
The r9...