I'll chime in to agree with the suggestion to drive them all.
I'm a fan of the Ram trucks. I liked my 6.4L Hemi, and the Cummins I just picked up as an upgrade will hopefully be solid.
But there's nothing wrong with the Chevy/GMC or the Fords. They're excellent trucks in their own right. Pretty solid options all around. It mostly comes down to personal preference.
There's no way to make a bad choice right now in the 2500/3500 range. Drive them all, and go with the one that you like the best.
Jason, Angie, and our boys, Sean (13) and Liam (8)
Now with Radar and Daisy, both Boston Terriers. Missing Artemus the Labrador, gone on ahead.
2016 Ram 3500 CC Big Horn - 6.7 Cummins - B&W RVK3600 hitch
2015 Palomino Sabre 33RETS Platinum fifth wheel