Me and my dad run a tent rental company. We have a double axle trailer which fully loaded, probably weighs 7,000-8,000lbs. Pulled it twice with my Ram last Fall, doesn't go long distances.
My dad owns a 2011 GMC Sierra 2500HD (Owned a 2009 Sierra 2500HD before, and every odd year before that) that we normally use to haul it.
My Ram accelerated and braked much better then my dads truck does with the trailer. The only thing my dads truck has over mine is that it doesn't bounce around as much. I'm sure it's due to my coil spring in the back, but above 40 mph, that trailer was bouncing a good bit with my Ram.