The Corsair TX, HX, and AX lines are highly regarded (with TX being the cheapest and AX the most expensive.) Corsair gets some of their units built by Seasonic, some by other companies. Some people want to avoid Corsair units built by others than Seasonic, but as far as I can see, if Corsair deemed them good enough to be under their label, then they should be fine.
I'd wait out and watch their new RM series though. Supposed to be an ultra-silent model to replace the TX series. It's not established enough for people to have used them long enough to discover long term reliability issues.
I happen to have a Corsair CX 600M. Not the best, but it's economical and it's been pumping properly for over a year now. Like Onus hinted though, you'll want good cooling in your case for this PSU, or any PSU for that matter.