Compared to most close-loop coolers, the H-Series is one of the better ones. That being said, I've never been a fan (ba-dum-tish) of close-loop liquid coolers. I got one of the first ones to start the whole craze, the Cool-It Domino ALC. After working very well for a few months it did eventually leak, and it was pure luck that it didn't hit any important components. Cool-It replaced it with the newer ALC ECO, which again worked quite well. Until I sold it to a guy and he said it leaked shortly there after as well. Maybe I just have terrible luck, or maybe Cool-It doesn't know what they're doing. From my own experience however, and from what I've seen working in the field of computers, close-loop systems generally operate more loudly, and are far more dangerous when they do fail. A good chunk of metal from Noctua will do just as well, while staying quiet and not immediately destroying your system if one of the fans fails. Well, that went a bit longer than I expected. Just my own two cents really, if you are set on a liquid cooler Corsair is the way to go.