There are lots of threads in this forum (PSU forum) about Tagans, the search function is your friend. They seem to have some quality control issues (ie ticking noise that is not solved by a fan swap) and as you say they run hot. There's no question the Seasonic is your best bet, like someone said in this forum the other day, it's hard to find someone who bought a Seasonic who wasn't happy with it. There are a couple of well-known issues between Seasonic PSU's and DFI boards, but that's about it.
You are preaching to the choir, my friend.
I already have a Seasonic S12-430 and S12-600 myself and I can vouch for Seasonic's excellent quality. So the question was mainly about this Tagan brand... and when you mention it I've heard about them running real hot before so they may not be such a good option afterall.
About the DFI and Seasonic issue, trust me, I know all of it. I had to replace my DFI nF4 LP SLI-DR in order to acheive any kind of stability at all (not that the DFI was very stable with an 850 SSI either, but stability is a general problem with DFI, looking for motherboards elsewhere now). (System wouldn't even cold boot, had to turn PSU:s powerbutton off/on everytime I wanted to boot.)
I'm not *that* interested in the Tagan, especially if you sent them 10 e-mails already and only got 1 reply.
Btw, why did you get the Antec NeoHE over a Seasonic S12? AFAIK the Seasonic S12:s are quieter?
Thanks for your time!