For users not concerned with getting the last few MHz out of a radically overclocked chip the Peltier coolers are probably a lot more trouble than they are worth. Condensation on the refrigerated side of the device can destroy your mainboard. Then there's the power requirement - a Peltier can require from 35 watts upward (I've seen one insane 120W unit) and that might mean you have to pay more for a bigger power supply. Peltiers are for dedicated and experienced overclockers only, and it's difficult to show that the cost of the peltier, power supply, other materials (caulk etc.) and time is less than simply buying a faster CPU. Once upon a time there was the famous Celeron 300A which could be overclocked to 450MHz reliably, but gains are not so dramatic now.
If quiet is what you want the Noisecontrol Silverado is a great choice - very, very quiet, and a good performer too - see the Tom's Hardware heatsink roundup. You might have to order it from Germany but they delivery quickly and are reliable.
The MC462 is good, but as has been pointed out is quite noisy and I can tell you from experimentation that it stays noisy with any fan for the same reason that a stamped metal fan grille is noisy - there is a lot of resistance to the air flow. Also the method of mounting is a little more involved than the usual heatsinks, four screws attach through the AMD-specified mounting holes in a socket-A mainboard. If you will have to move the computer the MC462 is NOT for you, it is far too heavy to be swinging froma mainboard subject to sudden shocks. I have a MC462 also but it has been sitting on the shelf with all the other also-rans since the Silverado arrived.
Current heatsink inventory:
MC462
Kanie Hedgehog
Blizzard solid copper
Alpha PEP66
I can't remember all the ones that have been tried and then re-sold or discarded.