Went with a the Seasonic G Series I posted above. Solid reviews (HardOCP Gold, for one), modular and I got it on sale for $89 @Newegg.
Thanks for the help in choosing Seasonic. The more I've read about them, the more they seemed like an obvious choice. The Tom's list of who makes who's PSUs made it pretty clear that even the best-of-the best often use Seasonic to produce their top PSUs (ahem, Corsair).