I got Huper Optik tint on my S at Pro Tint in Plano. Best prices around and good work. They only do tint.
Many people go to Speed Shield in Addison for tint (Photosync) and PPF (they have Suntek). They are expensive, but most who have been are happy with their work. I will probably take my 3 there for Photosync, since Huper at Pro Tint is not an option for the back window.