That's 8500-9000 pounds loaded with a family of 4+ gear and 1100+ pounds of tongue weight. The only "half ton" crew cab I would recommend is the HD paylaod F-150. You run out of receiver limit on that. Every other half ton crew cab has payload limitations for a family and 1100-1200 pounds of trailer tongue weight. The 2014+ GM twins with 6.2L/NHT may be close to be enough payload and plenty of power. Neither of those are likely to be found on any local dealer lot. Pricing will be similar to the 3/4 ton gasser for same equipment, so then it's about still about ride/handling/styling/unloaded fuel economy/availability. At this point you are probably ordering a 2015 F-150 and we don't know much about the details yet.
But any 3/4 ton gasser would be good off a dealer lot. Ram's 2500 with rear coil springs and 6.4L has has stellar reviews all around.