I went 30 all the way around except the windshield i left that at normal or 50 im not sure. TNT window tinting in madison is amazing. They will do clear bras and will put clear on anything else you want done on the car.
http://www.tntwindowtint.com/
Ran it all summer with no issues from the police. Had one officer mention something about it while just checking out the car but said he didnt care about it. He said unless you get nailed for something else most officers wouldn't bother it.