The real reason we buy these CTD's is for the HP and torque for towing/hauling and the Cummins reliability. If you never tow heavy, this truck does not make sense economically. The engine is a $6000+ option and diesel fuel, at least here in Washington State, has been 30-40 cents a gallon more then regular gas for several years. That eats into your fuel economy, over a regular gas engine truck, in a big hurry. There have been attempts, in this country, to bring out diesel powered vehicles, but this has never really panned out (very expensive option, etc). Even Chrysler has been talking about a diesel engine in a smaller truck (i. e. the 1500). We will just have to see if that happens, but I don't expect that consumers will be beating the door down for it.
The bottom line for me is this: If I didn't have a 32' 5th wheel to haul around I would not own this truck. If the price of the diesel option continues to go up, along with fuel cost, and this causes RV sales to go into a decline (which some say has already happened), many others will not own one either...