got a Q-Tec 550 from a freind for my b-day. *not* a good idea if your running a supremely overclocked 2800 Barton on a voltmodded nForce 2 400u chipset. not only that but its gonna have to handle a whole bunch of power hungry stuff. its fine for my brothers xp1800 that draws less power than a mormon vibe.
got myself a Antec TrueControl 550 the other day... i have never been happier with a PSU. *you can control the voltage lines!*