This is really one of the MOST important, and most overlooked components. We had a freakish, massive lightning strike several years ago that got into the power grid and it wiped out most of our Gateways and cheaper boxes (including the cheap SUN 4s and 5s). The boxes with Antec supplies survived.
PS is particularly important for SMP and doubly so for AMD as well! Am getting kind of bored with a mere pair of 550MHz and will probably go the the dual AMD boards soon... I probably won't wait for the Sledgehammer. Will probably take too long for the economies of scale to kick in and make it worthwhile...
Great product. I only use Antecs.