One thing I can tell you is the the voltage accurancy on my OCZ520 is superb, as is stability. Why it's not up to O/Cing the graphics cards I don't know! As for the 'winner' of that test, I take that with a hole ocean full of salt. Based on such good reviews (we had them in the UK as well!), I purchased a Neopower 480. The voltages were reading low (11.58), and it just couldn't cope with an SLI system, crashing would occur seconds into 3D. I used the Neopower and the OCZ together to prove it was a power issue, and with the two of them managed to O/C to 420/1140 - whereas 375/`040 wasn't possible before with the OCZ. The good thing with OCZ is their support is absolutely second to none.
The other unit that gets real good reviews is the Tagan 480, and as Its made by the same company, I assume that the OCZ should just be a version of it with a pumped up +12v rail (33a vs 28a).
I carried out a little experiment the other day, and ran my system in SLI mode with a plug in Mains power and energy monitor - it peaked at 300w, so even if we assume thats all +12v (which its not), thats only 25a, so there must be something else going on that causes so many PSUs not to be able to cope with SLI .
As for PFC - its useful if you want to help the environment, or if you are a commercial customer, or if you run a 'farm', but lets dispel myths.
1) PFC won't save you money on your home electric bill.
2) PFC by itself doesn't make for a more stable PSU.
I would prefer a PFC PSU, for the same reason that I don't use CFCS. There are some good articles out there on PFC, I think some people who should know better shouldgo out and read them!
EDIT Recommending a PSU because it has detachable cables, a lower price, and less noise, isn't the sort of recommendation I want to follow, and just FYI, my case install was tidier, with the twisted wires, and some sleeving, of the OCZ, than with the 'rats nest' that the Antec becomes when you have to use all connectors.