Karl,
Find some honest relibility reports, fuel mileage reports and make a decision.
One thing to check out. What manufacturer will void the warrantee IF you drill any holes in the frame to mount a 5th wheel or goose neck hitch? Why would they be worried about that?
You can put a hitch on that brand BUT in the recent past...I'm not sure about today......you had to use factory drilled holes in the frame or the warrantee on the truck would be voided.
Ask that question of the dealers if you do any serious trailer hauling or any heavy hauling.