http://pcpartpicker.com/p/qZzI
Its fine, only change is you might not want a wireless keyboard for gaming. But thats just a personal preference
Does having a wireless keyboard interfere with something or why is it bad?
No, it takes battery's and most have input lag (even a slightest input lag can be very frustrating when gaming). Battery's dieing when playing is sucky, and pressing a button and not having it work for a split second is also sucky.
some people argue that the extra time delay from a wireless keyboard is noticable. However I've never seen numbers about the time delay differnce. Plus theres the batteries dying in the middle of a match.
The power supply is adequate right?
130$ on a case for a 900$ setup..............................
this build seems pretty FACKED IF YOU ASK ME
http://pcpartpicker.com/p/r01p
The processor isn't as great but if you threw up some more you could get the one you picked.
Do something more like this:
http://pcpartpicker.com/p/r06k
The case doesn't need that much love. The better CPU and mobo will do wonders for processing. You can OC this system like a champ. You can combine it with whatever peripherals you like. You can up the 500GB to a 1TB Blue drive if you feel you need the space.
OPs build:
I see a laptop hard drive, a micro atx motherboard paired with a full tower case, a 7870 paired with a 1366x720 monitor, a bulldozer cpu, and an hdmi cable for some reason. Hopefully you haven't bought that already. Just look at the builds the others provided.