XSPC X20 universal Liquid Cooling Kit
 

I have used quite a few radiators over the years and this is one of the better ones I have had the pleasure of using. The only problem that I can see with this radiator is the fact that it is so heavy it could increase the weight of your computer, but you should not be moving a water-cooled PC around the house in the first place.

the performance tests are... well... lacking in depth?