If you have to ask ... you probably made up your mind already
honestly with just JB4 and DCI, can't go wrong and is a reliable setup.
But doing FBO + turbos, and using the CPI from Fuel-It instead of the PI system, could make the car MUCh more fun for a few thousand dollars. THEN it would be in a good spot to make a weekend-fun car. Get the truck and keep the car.