I have that mobo and it is not great for OCing believe me. The chipset gets hot long before the CPU. Im not experienced enough with enough components to really steer you to a better one but Im sure somebody here is.
Check out the asrock z77 extreme 4 $119 Also I have a 2700k right now. I see you are looking at the 2500k. I can tell you the OC on those is awesome. My first attempt went to 4.6GHZ and the only thing getting warm was the Mobo. Good luck bud.