<< The Arcticooler doesn't look very big (less surface area) and has a relatively small fan (less CFM) how could it be so superior? >>
If you compare it with the Golden orb, the reason why circular heatsinks perform better per weight is the amount of surface area. If you closely study the spec pictures, they have a full document on the airflow involved and maximized the surface cooling of the heatsink = cooler CPU. This is "futuristic architecture" at its best. If you compare this Arcticooler to an alpha, its like comparing a sleek compact japanese car to a brute force american automobile. Both can get the job done effectively. Compared with an Alpha, the Articooler is quite at par at cooling(not Golden orb though). There is one drawback, these circular heatsinks are not peltier capable.
<< Another question: if you put a peltier on a Duron, wouldn't you have condensation problems because the peltier is so much wider and longer than the processor on the Duron? How would one solve this problem >>
I believe(correct me if I'm wrong) that the Duron processor is actually the same size as a Flipchip, PPGA, Socket 7? the only exception is that it has more pins. Are you talking about the actual slug of the processor? I can't see how a 40mm x 40mm Peltier would have much problem with Duron.