I've gone through so many PSUs before settling on this one... A Coolermaster (yeah, I know...) various Corsairs, Antecs, Silverstones... I've even had this very Seasonic on the list before.
In the end I think this 1000 is going to be a great choice for several reasons:
1. Stellar reviews.
2...
The Extreme 9 is getting excellent notes everywhere I look, but it will be a few weeks before I'm ready to buy, so in the meantime I'll definitely be keeping up with new developments on relevant fronts.
Thanks for the heads up about warranty. I've been buying Sapphire cards for good 10 years...