Best Heatsink for OC'ing a Deneb

[Lude2Envy]

Hey guys. I just got the Phenom II X4 Deneb. Whats the best heatsink on the market for this cpu for OC'ing it. I think I read somewhere that people where OC'ing into the 4ghz range on air cooled systems. Thanks.

 

[Conumdrum]

Try here for info:
http://www.frostytech.com/
http://www.frostytech.com/top5heatsinks.cfm#AMDHEATSINK