You are kidding right, this is only a joke. You want to put one of the fastest video card with a processor that was considered slow 6 years ago. HUGE BOTTLENECK. upgrade your proccessor to something half decent before even considering the 5850.
the 9 series zalmans are crapThere is nothing wrong with the cooler, the Phenom IIs especially the black editions usually come with copper heatpipes. If you're not overclocking I wouldnt bother replacing the cooler, even on the stock heatsink+fan you should get atleast a small overclock without high temperatures.
Below are some good coolers though:
Arctic Cooling Freezer Xtreme Revision 2
Zalman CNPS9900A
Zalman CNPS 9700
Scythe Mugen 2