I love our dually.. wide hips and all. One thing to consider is maintenance items. For the trailer it's not a what if, but a when. Something I knew going into the dually class but also didn't fully realize the magnitude of work until it was needed.
Things to consider when looking at the duallies. Something smaller not really an option since you have the 5er already.
Brakes- costly and not like your average car if you're a diyer. Ours require pulling the axle shaft (F350)
Tires- You need at least 6, 7 if doing spare at same time
Roadside Assistance- I would put this as a must (if doing long trips) unless you are also bringing a small shop with you. Think- if you get a flat. Changing a tire isn't exactly easy with a breaker bar and extension on the rears.
