I've read plenty of horror stories from almost all RV makes. If you want the best quality in a travel trailer, find a place that makes custom horse or enclosed trailers and have them make you one. It will be expensive, about twice the price of what's on the lot at the local dealer... but it will likely have a one piece aluminum roof, aluminum frame, aluminum skin, a proper frame that is specced to the task at hand, proper axle weight capabilities, and so on.
One brand that I have heard good things about with no horror stories is Livin' Lite, which makes all aluminum rigs, with Azdel for the walls and cabinets. If it gets water inside, the rig gets wet... it doesn't rot. However, the "space station" look may not be nice for some.