Not sure what size fifth wheel you are looking at, but I would strongly suggest you look at a 3500 instead. There is very little difference in price, but you gain that all-important overload spring. At the very least do your homework on the "loaded" pin-weight of your fifth wheel, add the weight of passengers, tools, and hitch, then compare that to the weight capacity shown on the door jamb of your truck of choice. Most 3/4 ton trucks run out of capacity real quick. I have a friend who has a 3/4 ton Dodge, bought a fifth wheel a little to heavy, and the rear spring bushings are already worn out with 30k miles on it.
Also, the one ton is way cheaper now than if you have to trade up with 25k miles on the clock. If the fiver is over 14,000 lbs, I would consider a dually tow vehicle.
Last thing,....the tow ratings of the gas engine are reduced a lot. Much cheaper to verify the numbers before you sign all the dotted lines.
2016 Ford F-350 Lariat CC, 4x4 SRW. B&W turnover with extender. 2015 CC Silverback 29RE, fitted with Reese Goose Box. Amateur Extra Class K5TS, 2016 nights camped 16