I don't know the "West Coast brands" but Haulmark is definitely NOT junk. They and Wells Cargo are pretty much the top dogs when it comes to quality but they are also the most expensive.
Don't buy from Home Depot or someplace like that. If you go to a trailer dealer, don't be afraid to order something customized by the mfr. Get the options you want, it is easier and cheaper in the long run than buying off the lot, wishing you had got X Y Z, and then trading up later.
If you tell more about your use maybe you can get more useful suggestions. I use my enclosed trailers, 6x12 3500# and 8.5x20 10400#, for mowers and stuff, band equipment (drums/speakers/etc), just helped a friend move yesterday, might help another friend haul a car with the big one next week.
In the bigger trailer, I spent extra money for two rows of E-track, ten heavy D-rings in the floor, better plywood walls (the thin stuff gets torn up), spare tire and mount, loading lights, and an electric tongue jack and rear stabilizer jacks. These are all great for me and I will not buy another enclosed trailer without them. I got a winch also that is useful but I could live without it. I forgot to buy radial tire upgrade, and I regret that, because bias ply tires don't last very long and that is the default for most trailers.
Hope this helps!