Well the stock heatsink isnt too bad, It isnt the quietest around, but the noise is far lower than many other heatsink solutions for sale.
It does the job, minimum of fuss.
Should you be looking for quieter cooling, then something like the Volcano9 may be the go, a big 80mm temp controlled fan for quieter operation.
There are even better solutions around like the volcano7+, sk800 or the MCX-462, but if you arnt overclocking they are just expensive overkill.
<b><font color=purple>[Rik_]</font color=purple> I wonder how many people have made their own phasechange system?
<font color=blue>[LHGPooBaa]</font color=blue> I get phasechange whenever i eat a hot chillie