Hi Chris,
The CPU you are currently running is a 1155 socket. Be careful there, a 1151 will not fit. You'd have to replace the MoBo as well. As Alexander mentions, try to find yourself a I7-2700K, they should be quite affordable, even second hand should be fine. I have the same CPU and it works like a charm. Be sure that if you OC it though, that you have sufficient cooling. Stock fan is probably not enough.