Here's what RealHardTech has to say about FSP
"FSP Group was established in 1993 and nowadays stands as the 5th largest power supply vendor in the world.
FSP / Fortron cooperates as OEM with many companies (Thermaltake, Antec, BeQuiet!, Amacrox, etc) to provide quality products"
In a lot of markets Aurums are almost always the cheapest 80 Plus Gold units you can buy.
When FSP re-entered the retail PSU market with the Aurums, it was all they sold, so had to give a positive impression with long warranties, it is definitely a positive that FSP decided to support their product so strongly. Again, just because Aurums (used to be) the highest end design that FSP sold doesn't mean that it is a high end design in comparison to other manufacturers/competitors.
Just because it's not the best of the best doesn't mean it's low-end budget stuff. Which you might accuse the Raider PSUs of, but they still seem to do well enough. Hardwaresecrets certainly lavished praise on the 650W version.
Hardwaresecrets heaped praise on the Raider 650 despite its voltage regulation being +/- 5%, rather than +/- 3%; the +12V rail got as low as 11.59/11.41 (the lower limit is 11.40 btw). And actually falling to 11.32 when overloaded by ~30 Watts.
Also ripple and noise suppression wasn't that stellar reaching ~87mV on the +12V rails. Ripple and noise exceeded specification when overloaded by ~30W.
Which illustrates the point that you actually have to read and analyse reviews rather than just accept whether or not they get recommended, or not.