I can't say more than what JK had said. Being a first time diesel D-Max owner, this is the best set up you will get on the market. Maybe you are pulling a little light for the D-Max. But the diesel will blow the gas engines out of the water in nearly all performance catagories. Fuel mileage is a huge plus! Not only when towing/hauling but running empty.
The injectors can be a problem, but as JK has said, you can "help" your truck and potentially make the injectors last ALOT longer. Start by having JK set you up with the lift pump/filtration set-up. Alot of guys (like myself) run amsoil, or a synthetic. If you are concerned do an oil analysis every so often. Change the fuel filter! I do mine every 10k, or once a year. Maintenance, maintenance, maintenance. Like my grandad always said, "you take care of it and it will last".
Lastly, check in and read random forums, that alone has expanded my knowledge base. there is a ton of expert knowledge on here, use it.
Good luck.... Shed
01' LB7 2500 HD ext.cab, auto, 4" magnaflow, airaid intake, Mag-Hytec tranny pan, all Amsoil, Bilsteins.
In pusuit of the perfect camper pulling rig....
05'-30' Pilgrim 5th wheel
Always on the road headin for a campsite!