ok i didnt read all of the replys but i read your question..... it depends on your interior.. i went with 35% tints all around and it looks great [i have tan interior]

but if you want the more aggressive look you would have to go with 20% all around

DEFINITLY DONT get 20% in the rear and 35% on the driver and passenger ...thats pointless and [no offense] stupid........if anything i would say get 35% in the back and 20% on the sides..

--------------------------with tan interior---------------------------------

-if you have black interior you could get away with 35% all around and it would look just like you had 20%
the only difference would be that you can see out at night....i have 35% and im always driving windows down just to see...not to mention the concern of cops making you take the 20% off, they're illegal where i am