I had a 2005 Weekend Warrior FS2600 with aluminum sides and liked it a lot. We now have a 2008 Ragen with the fiberglass vacuum bonded walls and we love it. I believe the Ragen was a step up from the WW. The vacumm bonded wall offer better insulation but they are also an additional 800-1000 lbs. The bonded walls also block sound much better if you ever camp in loud areas like we do. one of the main reasons I was looking at the Ragen at the time I bought was that they came with 16" wheels and Maxxis Tires however when ours got built they had changed to 16" Transmaster tires. So far so good but I will probably be going with LT tires next.
If the Ragen has bonded walls? +. If it has 16" wheels and tires ++.
With eiether one of those trailers you will need a good weight distributing hitch and and possibly an upgraded hitch on your truck to replace the factory setup.