2004 M3 Suggestions

I recently purchased a 2004 SilverGray M3. I am looking for places to get my windows tinted, but I am debating on the shade that I should get for the color of my car. Any suggestions? I also dont want to modify anything in my car at this moment, but I want to get exhaust tips to make them stand out more. Any suggestions where I can get ones that were made for my car? Email me. Thanks