For every overclock, you also need good cooling. The stock cooling Intel provides definitely is good, but not that good.
First thing on our list was the HSF. We decided to pick up the Thermalright AX-478 which has been performing quite well according to many reviews online. It's an aluminum based heatsink which has quite a big surface area. We used Artic Silver 3 instead of the paste Thermalright included with their package.
How about our cooling fans? Exoticpc.com provided us with three fans - one CPU fan, and two case fans. Here is a snapshot.
Starting from the left, we have the Vantec Tornado 80mm fan. This bad boy is quite powerful pushing around 85 CFM. But that kind of airflow comes with a consequence. It produces 55DB of noise. Talk about losing your ears. We decided to use this for our CPU fan, coupling it with the AX-478, as pictured above.