Summary: The Zalman ZM-850HP is not just another 850W power supply. It is engineered from the ground up to be silent and efficient. Two heatpipes on the inside transport heat away from the hot components to the rear of the PSU where it is exhaust by a big slow running 140 mm fan. Since the PSU's efficiency is above 80%, Zalman can afford to run the fan much slower because there is not so much heat to get rid of.
Pros: Very very quiet, High efficiency, Modular, 8-Pin connectors for new VGA cards, Four PCI-E power connectors, Lots of connectors, Cables sleeved, 3 Year warranty
Cons: Expensive, Takes fingerprints, No power switch, Only 18A per 12V rail, but six of them, Longer than ATX standard, 21 cm