Many brands that sub-contract their products like Cooler Master, Corsair, OCZ, and many more, sell mediocre products that are usually not great value or quality. If you want a quality PSU buy a Seasonic where you get excellent performance, quality, price and warranty. Why pay more and get less with a re-seller?

Group regulation in 1000W PSU is just awful.

M2 1000W looks like it could work, if very cheap. But then again, if you need 1000W, you can probably afford better PSU than that, like, say, Seasonic Platinum 1000W or XFX version of it. Or new HX1050 Gold.

I wonder how many people are going to go for a 1000W supply in the first place. It may be technically interesting to examine these behemoths, but many more readers would be served by comparisons of 650-750W units. Personally, I think the high-power PC market is so close to dead that no manufacturer can really make money on it. I'm not saying that nobody at all will need or buy these; just that the number of sales will be miniscule.