It all depends on what you want. To most folks floor plan and comfort are top priority. Of course what your going to tow with should play into the mix. The weights you mentioned I would bet are terms like "dry" or "shipping", are what you mentioned and are totally useless. Look in the street side front corner for a tag that will give you the trailers GVWR and base your tow vehicle on that number. At least doing that you wont go wrong.
The differwnce between a 18 foot and a 23 foot trailer is nothing towing, not much backing, and a world of difference living. Also quit looking at new, look instead at used.
