Generally speaking, Antec has good power supplies. But so has thermaltake... And I suspect both have horror stories where a PSU died after a short period of time. But statistically, you're much more likely to have such a horror story with a cheap no-name (or bad-name) PSU.
(And it's also important to know what happens if the PSU dies. With a good PSU, only the PSU will die, leaving the rest of the system intact. If it's a bad PSU, it could fry your system.)