From my experience, if you want the best best bang for buck with the mods you have in mind, skip all the "stages" and go to the IS38 from the get go. I would have saved time and money had I done that originally.Has anyone done the unitronic stage 2 + tune on their 1.8? I want to have a good quality sound. Planning on IS38 turbo as well as down pipe and many more things. But, I want to make sure I get the best bang for my buck tune wise.