Haulmark has built trailers for a long time but has been known to have a lot of problems. The cost of a Haulmark is quite higher than others as well. Must be paying for the name and not quality.
United trailers builds a decent trailer and the cost is quite high too. They seem to hold up ok so maybe there trailer is #2 or #3 on the list.
Forrest River and Pace are about the same...High prices and a decent product..I'm looking foward to questions and comments.