Enermax introduced the ErPro80+, a new line of power supplies available in 350W, 400W and 500W editions. These units offer an energy efficiency of up to 86 percent, they are equipped with two +12V rails and cooling is provided by a 120mm fan. The specifications can be found at Enermax.
Brief overview:
The units are already available in European webshops, the cheapest stores I could find sell the 350W, 400W and 500W versions for 54.12EUR, 67.46EUR and 85.73EUR, respectively. We'll have a review ready on the Modu82 II version next week, which has ErPro enabled as well so we'll explain a little further on what that is in that article.