Good heatsing for amd phenom ii 720?

[zukzuk]

Wat is a good heatsink for amd phenom ii 720?

I have an antec 300 case with 4 fans (2 intake, 2 exhaust) and i want to be able to reach 3.6 ghz stable OCing

 

[AKM880]

Xigmatek S1283, Scythe Mugen II