Seasonic S12-430: Beyond the Super Tornado :: SilentPCReview.com. Seasonic’s Super Tornados are great, but they are being superceded by a slightly quieter Seasonic S12 series.
The Super Tornados are running down on stock and are quite a bit cheaper right now $91 at Newegg for the 400 watt SS-400HT while $102 for the 430 watt SS-430HB. Not really worth the extra 10 bucks IMHO, so get the Super Tornado until they run out.
The good news is that S12 series now adds 500 watt and 600 watt supplies for folks with really massive Prescott and big graphics card requirements.