Whats the point in dual rear wheels if you do not have a heavy load or are pulling something all the time? Just more rubber to buy and wear out.
Flat beds also tend to sling around more road debris. Full fenders keep the truck cleaner.
Keep in mind that the flat bed floor will be higher off the ground as well so if you do haul something heavy/bulky it will be more work to get the load up there.
Having said that, if you have a 5 pice band or a crowd on it in a parade the flat bed is really great.
Also with a flat bed you can place another alternate fuel tank under the bed or get the original tank out of the cab.
I have had both and my 41 1 ton has a bed and fenders that is the best way for me.
