One of the world's most popular brand for enthusiast memory is now expanding their horizons by offering power supplies. Corsair
will be offering the KX620W and HX520W
power supplies, specifically designed around high-demand systems. Supporting up to 50A draw on the 620W model, these workhorses supposedly can offer silent operation when supplying that much power.
The PSUs efficiency is rated fairly high at 80%, though I did not see any reference to them being a part of the 80+ consortium. They have many other nifty features as well, such as auto voltage detection, three +12V rails and even gold plated connectors. They look cool too.