Depending upon the HW of a 5w, an F550 may be needed to tow a 10-12K 5w with a family of 6 that is on the larger sized as mine is, 1200-1300 lbs when my 4 kids were adult sized teens. Add in 3000 lbs for hw, and you have a need for 4300-5000 lbs of payload. This would include the need for say some bikes, firewood etc that might be in the bed etc.
With that in mind, most fords, not matter the year or model, seem to be rougher/harder riding than dodge or gm in the same basic gvw/body style. Dodge being in the middle, gm usually the softer. Which is better or worst?!?!?!?!? I am sure we could ALL make reasons for all three options.......choose your poison and enjoy it!
marty