This site did a "power supply roundup" awhile back. I used to have the link bookmarked, but it has mysteriously disappeared on me. 🙁 Maybe you can find it just by searching "power supply roundup" or "PSU roundup" here on Anandtech.com. I think it was done last year or maybe the year before, and I don't know if another has been done since.
Enermax, Seasonic, PC Power & Cooling, Zippy/emacs, and Fortron are all PSU companies with good reputations for both reliability and performance. PSUs are really all over the map though because so many (maybe even most?) are not actually made by the company that puts its label on it -- many are made by another mfgr and "rebadged." AFAIK, I don't think Antec actually makes any of their PSUs, nor do OCZ or Thermaltake. This could have changed since I last read up on this, so don't flame me, guys, if I'm mistaken, but that's what I read here awhile back from a number of different people. And some brands actually use several different mfgrs for their PSUs and rebadge them, so Brand A's PSUs could be made by several different mfgrs at any given time. Confused yet? :laugh:
SilentPCReview.com does PSU reviews, so you might click on over there and check out what they have to say. You generally want to stay away from "throw-in" PSUs that come with most cases, as they are almost always of very poor quality. Stories of fires and fried components are not uncommon with throw-in PSUs. Antec and Enermax are exceptions, as they generally include fairly decent PSUs with their cases. They're not typically quite up to the quality of their aftermarket PSUs, but at least they're not likely to burst into flames or anything and should run most basic & modest rigs just fine. 😀