There are some tints that have 65% heat rejection in only 50% shade. It was my ideal tint but they wanted a whoopin' $650 for all 5 windows.

I already have tint (metallic) but most of my heat is coming from the front windshield. I'm thinking about going with some 80% tint (~45% heat reduction). That should keep me cool as I hate using AC.

 

Im doing 20% all around and possibly a really light layer on the front windshield. What do you think? Ceramic would cost another $100 I think.