IMO you won't ever benefit in ride quality going larger in tire size. Having said that, these trucks ride so well that you may not feel a real world difference in ride with 37's over stock. The bigger tires look better, drop highway rpm a bit. You don't mention if you have gas or diesel, depending on weight of the boat you could negatively affect towing capability with the 6.4 a bit by going bigger.
I stayed with stock size tires mostly because I didn't want the bed height higher, I'm constantly putting kayaks and paddle boards in and out of it in the summer, and didn't want it to be even more of a challenge on my old shoulders. Otherwise I'd enjoy going a little bigger.
Again just IMO ... I believe that the best on-road performance, from ride quality to towing capability to fuel efficiency, is from running with stock size tires. That doesn't mean there's anything wrong with going bigger, whether for looks or height or better off road capability, but I think at times people think they are gaining something with bigger tires and in truth stock size works really well.