TPU got to see Swiftech's H220X liquid cooling solution at CES 2014. Unlike most watercooling kits, the H220X is not a sealed kit, you have to put the block, tubing and radiator together yourself. Swiftech offers the kit in three sizes:
dual 120 mm (240 mm x 120 mm), single 140 mm (140 mm x 140 mm), and dual 140 mm (140 mm x 280 mm).
A key characteristic of the H220X is its radiator, which fuses in a reservoir and pump, so that's two less components you need to plumb (and four less chances of a leak). What's more, the reservoir comes with a lit window for you to check coolant flow and levels, and a port for you to top up, or replace the coolant.