If you take a stock Dmax, throw a $400 tuner on it, you have about 400rwhp (~530HP at the crank). No other changes necessary.
Where are you going to find a 530HP pickup that will actually tow anything?
This is what got us all hooked, but it's usually down hill from there or short after. Most usually take it too far and our trucks are either broke all the time or become useless in terms of a work truck.
Nothing can match a diesel with just a tune and exhaust for money and what we can do with it IMO. but building all out race trucks or street/race diesel trucks doesn't make as much sense to me as the cheap gassers