I am looking to upgrade to liquid cooling, but I am unsure where to start with a AIO liquid cooler. Right now in my NZXT Phantom case I have the two 200mm fans mounted on the top which I like since it keeps the inside of my case very cool. So if I want to use a dual 120mm radiator which one should I go with and would I still be able to keep my case fairly cool with the two top fans gone and only the radiator in its place? Or would it be better to go with a single 120mm cooler so that I can keep the top two fans? Any ideas would be greatly appreciated! Thanks.