Over the years we have gone from an extended cab 2500 DMax to a CC 2500 DMax, to the present 3500 SRW CC DMax. They all had long beds which I prefer because it gives you room for an auxiliary fuel tank and other storage.
Given the rather large rebates GM is offering right now I would go with a SRW 3500 with the DMax. Long bed if there aren't any reasons not to such as garage room.
If you care about such things GM is totally redesigning the DMax for 2017 with dealer delivery scheduled for early 2017. It will have quite a bit more torque and HP and the only thing it will share with the present DMax is the 6.6L displacement. Everything else will be a new design.
And I'm sure you have heard about the new Ford line of Super Duty trucks by now. They have really stepped up the game and would be my choice if I were buying a truck right now.
