If you are looking into going as far as a turbo, I'd invest in a good tuner and learn as much as you can about it so as you start with your big mods, you can tune as you go. That would also eliminate the purchase of a new pcm. Hptuners are good. They have a forum you can go to and read up and once you get one can get set up and ask any questions you might have. That's just my 0.02 on it and it has been said many of times on different threads to get a tuner first.