DMas, I'd buy a gasoline vehicle if I had it to do over with. Anyone can work on a gasoline truck. All parts and performance mods are readily available anywhere. Yes, I'd change the exhaust and air filter for my gasoline engine. Gasoline trucks do much better for short trips and maintenance is less with less oil and they typically aren't turbocharged.
Unless you are hauling heavy all of the time or plan to be high mileage or longer distances, you don't "need" a diesel. Based on watching the diesel prices over the past 7 years, I don't come out ahead compared to gasoline on fuel costs vs improved mileage. It is cool to have a very long range though. The initial cost is much higher and although you recoup some of the cost, you won't recoup all.
With a TC, the other advantage is that gasoline engines typically weigh a little less. Still, I do like the sewing machine like precision of a diesel. I was looking for a gasoline but was open to diesel with this truck. The smooth acceleration is cool.