fan&heatsink upgrade from stock core 2 duo procesor e8400?

[aaclunckaaa]

whats a good upgrade from the intel core 2 duo processor e8400 stock fan&heatsink under $50? I don't plan to overclock.

 

[chookman]

http://www.newegg.com/Product/Product.aspx?Item=N82E16835233003