I'm looking for a Liquid CPU Cooler for my i5-3570k to be OC'd up to at least 4.6GHz at around 40-50C under heavy load, and as low as possible when idle. Currently, it's being cooled by the Cooler Master T4 (smaller version of the Hyper 212) @ 4.2GHz running around 60-70C, 35-45C idle. I've never done Liquid Cooling, but the closed loop setups look incredibly easy and well worth it. I've seen a lot of Corsair H100i's in the HAF X (top mounted) in particular, but if there are better recommendations, I'd like to hear from you guys.