I started a thread just like this in the general forum a couple months back. I have since tinted mine and I wish I went with a lighter tint. Keep in mind what "dmax" stated when he said he wanted to see at night. The first night with my tints I hated it..... Having to put the windows down in New Engalnd in the winter to make sure there is no cars coming is a joke! I work nights and I'm going to be removing the dark tints as soon as I get time.
Just be careful on how dark you go if you decide to tint.