Also keep in mind that most people go into the purchase of a CLC type cooler because of the perception that it will cool better than an equivalently priced air cooler. It won't; it can also be up to 12 times as loud.
I would also avoid any cooler than mixes an aluminum radiator with a copper block as here's what happens:
https://martinsliquidlab.wordpress.com/2012/01/24/corrosion-explored/
If you want to go to liquid cooling via an AIO, you'll need a case upgrade (Entoo pro or Luxe highly recommended) and a Swiftech H240-X or EK Predator