Case Modders Australia has just posted a review that covers not one, but two heatsinks. Check out their take on the Dynatron Micro-Fin Copper Coolers and see if they're worth your hard-earned dollars. here's a snip:
"Microfin technology is a construction technique utilized by Dynatron that enables them to produce a much higher fin density compared to other heatsinks. The great thing about Microfin technology is that it doesn't rely on normal manufacturing techniques, (ie extrusion, forging and die-casting) but rather cuts through the aluminium or copper block to form the heatsink."