i never see anyone use
I have the EVGA 600b and it works fine. I managed to find one review of it and it was pretty decent too, with better performance than the corsair cx600. They have different models too, like the supernova series and their lower budget series
The supernova range got a good review at jonnyguru.com but I don't know about the other models.
I have a EVGA Supernova 750 Bronze running SLI 760's and have never had a problem with it.
EVGA appears to have three primary oem, FSP, HEC and Super Flower. I would consider them to be about average. Except when they used Etasis as oem, that would be below average.