I would take a look at Legend Trailers. I'm researching to buy a new trailer for the spring, and have so far been the most impressed with their operation. I spoke with one of the owners at the factory and learned quite a bit about trailer manufacturing. I've also spoken with the owners at NEO Trailers, and that is another good option if you are looking for a less expensive trailer.
What I've learned most is the old "you get what you pay for". Check their warranties and independent dealer networks. Professional trailer dealers don't like problems, so they don't handle bad trailers.