[misfit41]

Hi,
I am a car dealer by trade for 25yrs,a diesel is definately best for your towing,torque,runs cooler,etc.but I would ask myself how many towing miles versus normal miles I would use it,occasional towing I maybe would go gas,simply because it is MUCH more convenient to fuel,and more user friendly,quieter,etc,if your wife drives it she wont like pumping the diesel.
If you go with gas,gm or ford is nip and tuck I think,with the nod going to gm for body, interior design and durability,BUT if you go diesel,RUN, dont walk away from anything GM,,the new duramax is an improvement,but the 6.5's are junk pure and simple,and none touch the ford power stroke.
good luck ,,Tk