I drive a ram 3500 srw 6.7 mostly as a daily driver and love it.
It legitimately tows like a beast, and although exactly the same truck as my 2500 has so much more payload for the money.
If you're getting a big fw, it's essentially easier to be on the road and fill up where semis do. In fact, where does one even fill up with a gasser, and still be able to maneuver around a station?
What fw are you considering? Im on my 3rd season with a 42'er, i couldnt imagine fueling with th passenger traffic.
Anyhow, with ram, you'll be deiving and pulling with Cummins, so you're covered in any unforeseen circumstance.
Seriously though, get the 3500.