I like your way of thinking ardvark. For me so far, the Ram makes me the happiest. I like the looks. I also like the Laramie trim.
So it might be a Ram CC LB DRW 4x4 Cummins Laramie, just like TxGearhead but the 2020 model. I would consider used, but all the good ones get shipped to you the US for some reason. Also, I wouldn't really be able to tell if its been beat up or not.
TxGearhead, you mentioned a rear sway bar. What about rear air bags? My camper dealer is recommending power adjustable air bags, controllable while driving both up and down and side to side for $2300CAD plus tax. It's a lot of money but I get that you want the truck to ride level. Are they really necessary? If, so, are there cheaper options out there?