I bought a new Dodge 3500 with the Cummins this year. I love it. 600ft/lbs of torque and 16mpg pulling boat. The power is almost scary sometimes. It did take some getting use to but I’ll never own another gasser. Don’t bother with the automatic the 6-speed manual is bulletproof.
I drove a chevy but found it to be very sluggish. Not sure if it was the engine or the auto tranny but I didn’t care for it. I am sold on Cummins in-line 6 approach compared to the V-8 or Ford or Chevy. With the 6 there is about 50% less moving parts and should be less trouble and lower wear.
I believe the Cummins’ displacement is less but HP and torque is highest.
Go get one and don’t look back! Then tell the Hemi guys you opted for the 6 cylinder. Watch the look on their face when you pass them going up a hill pulling the boat.