I don't think you can go wrong with anything Zalman puts out for their AMD line (three pages of solutions at that link). I also don't think that you could go wrong with anything from Thermalright either. With the Thermalrights you have to add your own fan, and that gives you the option to get a really quiet one from Panaflo.
These are just suggestions based on my limited experience with both products, I am sure there are others that will have more experiences and will be of more help.
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