Are you sure you want to overclock?
Given that you are a first time pc builder I can't help but think that you aren't quite aware of what overclocking gets you. Two things: You can save alot of money by getting the not-for-overclocking versions of the cpu and motherboard you want, not to mention not needing liquid cooling for the cpu. You also won't see much performance benefit from overclocking.
Current games are not capable of hitting the limits of the i5 at 1080p. Especially not in a $1,200 build. That test posted above shows that you need at least a Titan X running GTA V at 2560x1600 you max the cpu out at 81fps. So overclocking won't give you a performance boost in games. It would be much better to take the money you save from getting the not overclockable cpu, motherboard and air cooler and getting a much bigger SSD. Then you can put your OS, and a bunch of games on it. With that cost difference you might be able to swing a 500GB SSD.
Here you go:
http://www.newegg.com/Product/Product.aspx?Item=9SIA29P2TN6083