Get the Ram 2500 with the Cummins. You will be much happier towing with that, rather than the other ones you mentioned.
As far as daily driving, I would rather drive my truck (see signature at bottom) than my wife's Mercury Mountaineer. It is more comfortable, just as quiet at speed, and you can see better in traffic. It also gets better mileage although the fuel price is usually higher than gasoline.
I think much of the credit for the ride goes to the air suspension I have on the rear of mine. It not only makes the ride smooth both towing an not, it also allows for easier hookups and disconnects.
Can you tell I REALLY like my truck? :B
Barney
2004 Sunnybrook Titan 30FKS TT
Hensley "Arrow" 1400# hitch (Sold)
Not towing now.
Former tow vehicles were 2016 Ram 2500 CTD, 2002 Ford F250, 7.3 PSD, 1997 Ram 2500 5.9 gas engine