Although I've nothing against Antec PSU's(gone through many over the years and currently have 2 systems running 'em) I'm kinda dismayed that the Truepower 480 only put's out 22A on the 12V.
That's kinda meager for up-to-date higher end systems with power hungry video cards,CPU's & memory.And add to that multilpe case fans for cooling.
I'm not neccessarily pointing in the direction of getting the biggest baddest mega power PSU,but rather a good quality PSU with adequate output.
When I built my current system my choices of PSU were influenced by 1.Quality 2.Performance 3.Dual 12V rails for dedication to video card powering 4.Modular rail capability5.Qiuetness 6.Cooling The latter 2 kinda go hand in hand given a 120mm fan cools well and is qiuet.
That narrowed down my choices a lot at the time I was shopping around and I basically opted for the Antec NeoPower 480W that met all those criteria.A good investment indeed it is.Couldn't be happier with it unless it had braided wiring.That is the only thing I'd change.
My advise is to invest in a good PSU that has overhead for upgrading.Then you'll never have to question it as a reason for any problems.And I mean come on,it's not like the price difference is that much between middle to top end class of quality PSU's.And afterall it's one,if the most important piece of equipment in your computer.You wouldn't want to build a Mercedes with a KIA engine in it now would you?