I don't know of a good source for this info but keep in mind that real quality costs lots of money.
My friend who is very quality conscious, just bought a new trailer and without naming brands, was very disappointed in what he found (he wanted to spend somewhere in the low to mid $20K range). He finally settled on a Artic Fox but had to pay about $5000 more for it than the lesser brands were asking.
I noticed other models of AF were nearly 30% more than even some middle of the road grades of trailers.
Very much worth it though IMO.