The Areoflows have bearingless fans which are some of the quietest in the industry, and ultimately reliable because they are, well, bearingless. It is possible to get a better thermal resistance with another HSF, but not without going to a bearing based fan, and the HSF's that outperform the Areoflow don't do it by a significant margin and plus they weigh a ton cause usually they are solid copper. That can possibly put a physical strain on the mobo if it's in a tower case.
Bearingless fans more reliable than ball bearing fans? are you sure? I always heard the opposite, but I know they are quiter (initially, after one or two years they are the same as ball bearing fans or even worse).
Olaf
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