I dont think it will fly, far.. The EPA is getting too involved with diesels to make them cost effective in the long run, at least in a small truck market.
I have an 08 F250 sitting right behind me with an EGR coked up to all **** and a plugged DPF filter all from lack of use with a mere 70k miles on it. They dont run the truck hard enough to even regenerate the DPF!
The one great thing about wanting a diesel in a P/U is you had step up into a 2500 series truck, everything was built heavier, normal wear items lasted 2-3x what they would in a 1500 series truck. Every direction I look at it, it doesnt add up.