Rosewill has a name on psu. So he's choice will be fine. 80 PLUS Gold Certified, Single +12V Rail? thats a badass psu!
Eh, technically most Rosewills are mediocore. Only the Capstone, Tachyon, and Lightning series really stand out (the ones made by Superflower). Gold is fine, not a huge deal. And honestly I prefer more than 1 rail once you get beyond a certain amount of power, I find it's much safer for the components.