Building a new rig. New to liquid cooling.

Ok so I was looking at some liquid cooling options as I'm getting a month or two away from building the rig. I was looking at the kraken cpu cooler. I am also looking at liquid cooling the video cards. I've decided to go with two 980's as of now. But that's not set in stone. Would it be better to have one loop or have a loop for the video cards and the Kraken for the cpu? I was also looking at the Corsair carbide air 540. I was wondering if it would be able to house my loop as I don't want anything outside of the case.