lots of messages on psu at hardforum
recommended list I've seen...
Antec
Enermax
Fortron
OCZ
PC Power & Cooling
Coolermaster
Sparkle
Seasonic
Vantec
Zalman
Tagan
Zippy/Emacs
Silverstone
Me, I'd try to get at least 420 or 430 watts. In some rare cases, some motherboards are very power hungry or defective (whatever), anyway and require around 480 watts.
So, if you have a favorite place to shop, it's easy to narrow down the list. Only look at those with at least 400 watts, are in a certain price range and are on the list. Have fun. 🙂