That's a little more expensive than I'd go for, but it is a great PSU and its top-notch quality probably makes it worth the price for those who want to pay for it. Seasonic, in my experience, is about as good as a PSU brand can get, at least right now. I've also read that XFX is around Seasonic in quality too, but I'm not sure about that.
All XFX power supplies are built to spec by Seasonic, a couple are just Seasonics with an XFX label
Definitely "around Seasonic in quality"