Now that is a killer deal, these are new Antecs, with separated circuits for 3.3 and 5. They are much more quiet than older Antecs and have fan monitoring and control like Enermax. That is one magnificent PSU, the specs are for 80,000 hours at 25C. Perfect for dual motherboard.
Redshirt, you are right, you don't need it if you don't need it (Yogi Bera?), just think how long can 50,000-80,000 hours last to you and would you need it in a future PC?
Tristram, I don't see anything particularly cheap on netex, which one you had in mind?