[wingnut60]

You can go on any RV forum and ask that question--most of the time the answers will be biased toward whatever the person answering owns and loves...
Also, be sure to remember that most of the truck mfgs rate their vehicles using the bare bones lightest model with one person on board---AND, most RV mfgs optimistically understate the as-delivered actual weight.
So, first you need to know WHAT you want to tow--size, weight, TT or fiver, etc. Then--gas or diesel?
I think all of the new trucks are excellent vehicles, but you do have to match what you buy to what you will tow, always remembering you may want to upsize the trailer in a few years.
Its a jungle out there and you need to do lots of research to be sure you don't make a $$$ mistake.