Welcome! Nice ride, I have an '06 GT in Vista Blue as well!
I would recommend our Steeda cold air intake and SCT X3 tuner. We do tuning as well. And you can get free tunes for any new parts that you purchase, so long as you purchase the parts from us! Steeda is ISO 9001:2008 certified, which basically is a quality control certification stating that we consistently make high-quality parts. We are one of the few in the aftermarket Mustang industry that have that certification. Our Steeda parts are also made in the USA, and they also carry a lifetime limited warranty. We also have an exclusive partnership with Ford via their Technology Transfer Program. So you can rest assured that you are getting a great tune for your GT when you choose Steeda for your tuning needs!
Let me know if I can get you one of those!