Just bought my wife an 07 ltz. I love it. I have 04 dmax with banks and LOTS of mods. I want to keep this simpler. I would like better gas milage and a little more power, but the wife will be the primary driver, no racing, and i don't want anything that will hurt the longevity of the motor/trans. I'm guessing a programer, like hypertech or something like that, what do you guys think?