I love my merc stealth keyboard. In my opinion, best FPS gaming keyboard available (and I've tried pretty much every other one).
If it's gaming only, why not go with an i5 760 and a P55 chipset micro-ATX board? It will save you a good chunk of money and provide similar performance.
by the way that CM fan will not fit the door of the Vulcan without some modding. I tried one of them with my Vulcan case.
also, spend a few more dollars and get some decent RAM. A-Data ram is not stellar...