The heatpipe based coolers from Coolermaster for AMD and Intel did very well in the reviews on:
THG AMD coolers
Go to the P4 cooler performance ratings at Overclockers.com
However, some people claim, that the heatpipe concept can not work in a tower case, as the heatpipe is not going upwards (that is where the warm liquid should go to).
To be honest I can not judge, if the good results of these HSFs are coming from the heatpipe or the simple fact, that they are made from a massive piece of copper. What I know is, that you still need a good fan. And the old equation, that more airflow gives lower temperatures is still true.
I own a coolermaster ICH-L71, which is the silent version of the P4 heatpipe HSF. It comes with a fan, that runs at 2500rpm, with that speed it is only slightely better than the Intel HSF. I replaced the fan with a YS-tech 4200rpm one and got the temperature down 3-5 degrees compared to the (already good) Intel HSF. Overclockers tested this baby with the 5800rpm YS-tech fan and got even better results, this version is currently the best HSF for P4s on overclockers.com (other sites still prefer the Swiftech or Alpha coolers).
That all boils down to:
1.) The Coolermaster heatpipe HSF are good coolers (but there are other good coolers available too)
2.) The level of cooling you want to achieve is heavily dependant on the airflow produced by the attached fan and the level of noise you are willing to take (you may even want to use one of these isane Delta-She's running at nearly 7000rpm)
Hope this helps
Cheers
Speedy