Before I answer, what exactly do you want to do with the truck? Do you have a dollar limit, because everything has to work together. Fueling and airflow must be matched, otherwise you'll have a black smoke belching engine that suffers high exhaust temps and bad fuel economy.
Now having said that, the VP44 pumps, like the one you have on your truck, got messed up because the lift pump (supply pump) would fail. A FASS System should be mandatory and one of the first things you do so you don't have to face replacing your injection pump.
Very expensive, even for a rebuild. Put the highest capacity FASS unit on with larger lines, and this way you'll have room to grow as you hop up the truck.
Injector wise, I'd wait. Max out what you have first, drive it around and see what you think. The truck, even without putting injectors in, is going to be an animal. When you pull the trigger on a motor that has over 650ft/lbs, you'll see what I mean.
If you still need more after that, then do the injectors and turbo at the same time. Aggressive fueling and timing is going to max the turbo out in short order, so ask the injector supplier what turbo has the airflow requirements to burn up the extra fuel so it makes power instead of wasted heat and smoke.
I'm telling ya, the driveline is going to play "The Weakest Link" , so make sure everything from the flywheel back can take it.
