I pull at 9k dry 10.5K loaded 5th wheel with my 2014 Hemi 6.4 with the 3.73 gears. That dry weight + a heavy slider hitch + myself, wife and 3 small kids puts me right at my 3000# payload.
The truck does very well with that weight. My only complaint is the dreaded country mile gap between 1st and 2nd gear. When on a low speed steep grade it's a PITA as I can either rev it out in 1st gear up to about 40MPH (probably 35 with your 4.10 gears) or lug in 2nd.
If I were truck shopping today I'd go with a diesel for sure. But, this truck works just fine and I can't justify the $$ to change trucks only 2 years in. Again, aside from that one specific annoyance it's a great truck. I can easily pull steep mountain pass grades at the speed limit.