Very nice build and Mod
, IMO for improvements i think you need get both the fans near the CPU the same - green blades or with green LEDs, and fit a new cpu cooler, a suggestion for a CPU cooler is NT01-pro from Silverstone the
http://www.silverstonetek.com/product.php?pid=367
Fit two fans to it and Orientate is so that the fins are at the back most of the case, it would line up almost perfect with the cutout there, then change the case fans to the right to instead push air into the case, so positive pressure is placed on the GPU and CPU pushing air out the back