From Thermalright, SP97, SLK948U, SLK947U, SLK900U/A, SLK800U/A, the performance difference between these heatsinks aren't that huge with high-powered fans, <A HREF="http://www.thermalright.com" target="_new">Thermalright</A> is the best company for high-performance heatsinks.
From <A HREF="http://www.swiftnets.com" target="_new">Swiftech</A>, who also kick ass products, MCX462-V, MCX462, if you're into Peltiers, then MCX462-T with a 92mm Tornado is definently the best air cooling solution possible, but this'll be loud, and you'll need very very good airflow in your case.
<A HREF="http://www.zalmanusa.com" target="_new">Zalman</A> differs from the 2 companies i've mentioned, they focus on silence, their best product for amd are the CNPS7000A-CU, which is their pure copper version, and a aluminum/copper mix version which is called the CNPS7000A-ALCU.
<A HREF="http://www.vantecusa.com" target="_new">Vantec</A> makes a product called the Aeroflow, it's in my opinion the best bet of all the heatsinks, moderate noise, priced very low, half if not less than the price of Thermalright/Swiftech/Zalman products. Stay away from Vantec Aeroflow 2, it sucks, version 1's the best. These aren't for enthusiasts, they just run your chips like 5-10C colder than the crappy AMD stock. These things are maintenance free, the TMD fan doesn't die, and the heatsink doesn't require frequent cleaning.
<A HREF="http://www.thermaltake.com" target="_new">Thermaltake</A> has also came out with a couple of nice products for socket462 recently, their Extreme Volcano 12 is a very good cooler, the fan's speed can be controlled, i believe from 2000 to about 5000RPM.
These are all the good ones i can think up right now, i'll post up more when i remember more.
<A HREF="http://forums.extremeoverclocking.com/myrig.php?do=view&id=17301" target="_new">My PC</A>
Facebook
Twitter
Instagram