Only the Thermaltake Toughpower is good. Their other ones are crap. Antec isn't as good as it used to be. Lots of crap powersupplies coming out from them. OCZ....don't know what to say about them as they had reliability issues and ripple issues with each of their different OEMs. I would only get the OCZ EvoStream 700W/600W powersupply based on the OEM 3Y which manufacturers 1U and 2U redundant powersupplies. Enermax, i can say is you can do better for the money. Now after 'bashing' all those companies, you're probably wondering what i recommend.
I recommend getting http://www.newegg.com/Product/Produc...82E16817182016
for sub 50 dollar budget. Now for those that know me on this forum, don't go running around screaming "OMG OMG OMG OMG OWNAGE RECOMMENDED A ROSEWILL POWERSUPPLY OMG OMG OMG OMG" but wait till you read the review posted by someone who can review psus correctly, jonnyguru. http://www.jonnyguru.com/review_details.php?id=48
But a little better one, is the Ultra X-pro Review here: http://www.jonnyguru.com/review_details.php?id=45
Its better than the Rosewill powersupply.