Glade to see you waited till you could pay for the parts you want, smart move.
I would make a list of what you want your Dodge to do, and go from their. At the top of the list should be the gages, they run about 300 for the EGT,BOOST, and OIL PRESSURE with pod. The next thing on the list depends on the condition on the truck, if the clutch is week, then I would have it fixed. This is a large part of your budget, the price depends on what you want and who does the work. Most likely the end price will be 800+, but the truck and it's new HP are useless without a Stout clutch. Next I would opt for the Fuel Plate, and a new intake air system. This should give you a good boost in performance, and the parts will be compatible with any future mods. Once you are to this point, you will have more of an ideal on what it is that you and your truck needs. Good luck and have fun