Re: Chevy Duramax or Dodge Cumins????
Having been looking at this, this is what you have to consider.
Motor, current Ford is junk, Cummins is powerful, Duramax has good top end.
Transmission, any auto will have issues even today but the Allison is better than what Dodge or Ford has to offer but with manual, the 6 speed in Dodge is well built.
Ride, I have always liked Ford ride over the rest, Chevy is second and Dodge sucks.
Fuel economy, Dodge will do better under full load but down the road empty or light load, Dodge and Chevy will be close tie and Ford will suck.
There is rumor that Ford is dropping Navistar for multiple reasons but again, rumor.
Now for my bias background, Ford fan, 7.3l Powerstroke was the last good Ford engine setup. I currently have 2006 5.9l Dodge 4x4 crew cab. If I had to do it over, F450 Ford with Cummins and manual trans. 4x4 crew cab. I was not aware of the Cummins option until I asked a friend that is a tech. I get 21 MPG empty and 17 MPG with my 19' IB/OB. With 10k weight on 20' trailer, get 14-15 MPG. The Cummins loves to pull and pull hard. I bought the truck in 06 with the best motor, not the best ride.
Now you have a choice, what will you really use the truck for? If it will be more driving to store and haul a couple of dozen times a year, is the $10k upfront and the larger maintance worth it? Remember, its not 4 quarts of oil, its probably 4 gallons. If you dont get the temps up, the motor will carbon up and expensive injector replacement. If in northern states or Canada, winter blend fuel and plug the truck in when it starts getting cold. These medium duty trucks are meant to pull heavy stuff, not get your groceries. You can use it that way or any way you like but you will have to worry about repairs from cylinder wash (idle too long) or turbo cook (not letting oil cool before turning off engine).
I am not trying to scare you but as someone that grew up with diesel in the veins, I know how a poorly maintained diesel can be very expensive to run and the value is then next to nothing.