It's a reputable shop in the OC. I don't know rates in NY, but probably a little higher. You'll still use the stock resonators, so that saves about $100. It's an easy job for any decent shop.
Let me get this straight... You are swapping out parts designed by some of the top engineers in the world because some guys sponsored by a company told you it's "better??" But when you ask the same guy about tracking, "oh no, I have a kid now" or "I just detailed my car." or "i just got new tires."