kennedy's dyno tune does great work. however they are a bit pricy but you get what you pay for. i had a friend have his kenne bell whipple charged 5.0 stang tuned there and it ran like a beast after they tuned it for him. he said it was worth every penny and i wouldnt doubt it, he smoked my built 306
I'm going there next Friday for a dyno run. I'll let you know how it goes. I don't know anything about their water injection system, sorry. Although personally, I don't like the thought of injecting water into my engine.
Actually, I was planning on taking my '01 there for the KB treatment. However, during the wait for the kit to become available, the '03s were announced. Couldn't resist!