We just went through all of this and purchased a Keystone Passport Elite 28bh. It's longer than what you're looking at but we had to stick with light weight trailers. We have 3 boys so needed the bunk house too.
You might take a look at Keystone Passport series. You can find light weight trailers with bunks and slide outs. Bullet was another that was light weight with slide outs and bunks. Cruiser had models as well. We have a Dodge Durango with a hemi and our trailer towed pretty well. We did get an anti-sway hitch which really helped.
