Elkfarmer gave you a list that includes two high end 5th wheels. The problem with a 2-5 year old New Horizons or Spacecraft might be that it could set you back 150 - $200,000. Are you really wanting to know the best? Many of the decently well built 5th wheel manufacturers have gone out of business.... such as Carriage; Excel; Hitch Hiker ... And then there was Continental Coach which went out of business ... they were in the Spacecraft/New Horizon league. If you're buying used do you care if the manufacturer is still in business?