So what did I replace it with? A Seasonic S12 600W. $188 shipped next-day air from Newegg. I would have liked to have gone with a PCP&C Turbo-Cool 510W, but that would have been >$250 by the time you include next day air shipping. Sparkle/FSP doesn't make a unit that provided the sort of current/rail combinations I was looking for.
Luckily, my hard drives appear to have survived the failure. I have no idea if the motherboard/CPUs/RAM/cards are still OK, as my emergency FSP 400W is out on loan, and all other power supplies are back at home.
Bleh.
Greg