Corsair and XFX don't make power supplies, they put stickers on power supplies. And their good models are made by Seasonic or Flextronics anyway. There's more to a product than the name of the company etched into the side of it.
If you open up one off the Rosewill Hives, Capstones, or Fortress PSUs you will find really high quality components. This is what's important, not the name of it.
I get so tired of all the "only buy Corsair, XFX, or Seasonic power supplies" sheep that go around reiterating this statement and don't even know why. The Corsair CX and TX units are made by CWT and are very average. The only perk is that Corsair makes good on their warranties.
The Corsair RM series are terrible. They didn't skimp on the cost, they're expensive as hell, but leaving out a rectifying bridge and cheaping out on half of the caps and other components as well is proof that they think they can get away with it.
"Oh everyone says to buy our PSUs, so we'll make a new line, charge a bunch of money for it, and since it's expensive people will think it must be good"
I don't buy in to that nonsense.