I chose to go with Formula One Pinnacle tint with 50% sides and 40% rear.
This was the first car I have ever wanted to tint but it's also my first black car. The main reason I decided to tint was heat reduction, plus a bit for looks, although I'm extremely worried about getting a ticket. I drive by the local PD everyday and the motorcycle LEOs eat at the deli next door to my office. I therefore talked to Matt for a while and explained what I was trying to accomplish. In the end we agreed that 50% on the sides and 40% on the rear was the way to go.
My tint will most likely seem very light to most but I'm very happy. Hope to get pictures soon.
Hope this helps!