A PSU can make, or quite literally, break your system. As such, we only list PSUs that come direct from reputable ODMs in the industry, with good track records in the enterprise market.
Sometimes you can find a better deal on a PSU via resellers or OEM rebrands. However, reseller brands (corsair, EVGA, etc.) release revisions and products in the same series from less reputable Shenzen designers, and navigating the details of this market can be a lot of trouble.
If you can find them, Seasonic, Super Flower, FSP, Channel Well, and Delta are the brands to look for.