Since you have a lighter interior, you can go darker than 35 and it wont look as dark. Most ppl put 35 all around though.

 

Im planning to get sterling interior. I want to tint 20% in the rear window and 35% on other ones because you don't really use the mirror to back up when you have the camera. You can't see much out of the rear window when you reverse.

 

Well.. I debated over the tint for a while but I ended up putting on 30%. I think it is perfect. The TP with black interior and 35% looked good but my sterling interior is so much lighter. So that is why i went with 30%

Here are a couple pics: