campercoop -- tow rating mean nothing to me, it's payload. we haul a truck camper, not tow a trailer. Although we sometimes tow a "toy trailer"
Crew Cab -- it's mostly about the look, and I believe the crew cabs are longer or larger, or something. I like the shorter view/look, like the X-cab before and what the 1500 now calls the Double Cab - but, unavailable in the 2500HD.
I know, "dead set against the Crew Cab" - maybe it's just me (well, it is me :) ) but it always looks to me like a Crew Cab is a 4-door car/SUV with a bed on it. I know, it ain't, but it's not a look that appeals to me - for whatever reason.
And if I'm going to spend that much, it should be what I like -- so, will wait it out. Not in a hurry, maybe the 2015 will have the X-cab style option.
Remember when (I think it was a Tacoma) had the rear storage area, without a side door ... that's what I liked then too, just the space, not the seat. We run with the seat up anyway, and carry 'stuff' back there. Doors are nice, of course, and convenient, but not the double-size doors - Probably a better option with family and kids - but not anymore for us. We're done with that :)