Your description of the trailer size are well within the 3/4 ton truck capacities, gas or diesel. But since this will also be a daily driver for your wife, I suggest you have her drive several trucks, and dont only look at GM. For what you described a ford F-150 especially with HD pkg and the 3.5 eco boost would serve well, and be a somewhat easier vehicle to feed as well as possibly be a better feel for your DW.
I dont know how many miles a year you anticipate towing annually, but the commute miles will definitely be cheaper and likely as, if not more comfortable with the 1/2 ton platform.
Try them all, all the big three trucks are capable and functional, but comfort in driving and handling are extremely important.
