all the ones i mentioned are am3+, all the ones in the 50+ are great coolers and will run quite, the gaia or 212 evo are better than the tx3 or cnps 5x. the tx3 and cnps 5x have the easiest installation, same as the stock amd cooler, and also forgot the mention the cm t4. If ur not looking to overclock then any of them will do more than enough, and well the bigger fan usually the quiester and well the higher priced ones will be better than the lower ones if overclocking. my cnps 9990max with my oc i can run at silent no problem and it comes with a resistor for low rpm running.