I am still looking at the 07 Mustang v6, pretty sure I am going to buy it. I don't even have the car and I am already planning to mix it up a little. Looks like I can get a CAI kit and a tuner for $500 or so. That should add a little power and maybe a mpg. I hear H pipes have a better sound and the X pipes add more top end hp. Couple questions:

1. Is it worth buying a tuner or can a shop do it for relatively cheap (<$50)?

2. Stock, X or H pipes, and why?

3. I a CAI/dual exhaust setup worth it?