You can check some PSU user reviews here:
http://www.techimo.com/reviews/showcat.php?cat=26
You can also target your search at ResellerRatings,
http://resellerratings.shopping.com/...ower_Supplies, where some PSUs have Epinions reviews.
You can also try a search at
www.Techimo.com where you may find posts about power supplies.
You can use Google to research more info.
My systems are protected using an
APC Back-UPS ES 500 using their PowerChute software, for about 5 months now. So far, no problems, works great.