Another thing to consider, and this is especially true of the Abit NF7-S boards, is that socket air-flow can seriously alter the temperature readings seen. The presence/absence of a decent 80mm fan blowing over the socket/mosfet area can be as much as 6C reported temperature differences, just due to the air-flow alone cooling down the very hot mosfet area, and also cooling down the socket region which affects the reading of the thermal probe.
With a HSF you get the air-blast off the fan that provides that effect. With water-cooling all of that effect is gone, and this is one of the biggest reasons for why people who rely on the in-socket thermistor readings can be less-than-impressed with the switch-over.
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