If you listen to a lot of people they'd have you towing a motorcycle trailer with a diesel dually. I towed a 34ft. 7,500 lb. trailer with our Chevy Silverado 1500 all over the south with no problems. Keep your speed below at 65 mph or below and you'll never have a problem.
You will use your truck 90 percent of the time not towing anything so why shackle yourself with a monster truck for towing something under 8,000 pounds?