2008 Chrysler 300 Touring

Guys & Girls
I am having my 2008 Chrysler 300 Touring Black on Black tinted. The shop will be using Johnson Window films what percent would you recommend? I am thinking of going with either 35 or 30%. Please advise on the film and what would look good. I currently have 40% on my silver 300, but its not dark at all. Thanks
T

on the black on black the 40 would look darker so the 35 would be fine but i would like the 40 better myself and it would look awesome with the johnson greystone line

class do you have any pictures?

one of my favorite to tint - easy bg - and no rear 1/4's