Another couple of considerations,
Where are you? Some brands highly touted on here have no, or very few dealers east of Denver.
Also notice that the remaining manufacturers make many different lines. Forest River makes about 39 different lines of travel trailers, Everything from the cheapest they can come with a way to stick something together, to some that are decently designed and constructed units.
Best suggestion is to find a floorplan that you like, then start going through the lines, in general , avoid the cheapest line from most manufacturers, You can find most floorplans offered in just about every product line, so select the one that meets your price point, then verify construction items that matter to you. Filon exterior, corian countertops, whatever are the top things for you.
Generally better quality materials will be a little higher end, but they wont put too much more time into them or the price point goes up again.
On the other /Nationwide brands, I would suggest you try to determine how you intend to use it. RV Parks, Boondocking, always on utilities or large tanks to carry more water. All come into play in your decision.