Be careful with mirrors that attach solidly (glue) to the windshield. It is very easy to hit the mirror unintentionally. If the mirror is mounted solidly this can lead to cracking the windshield.
Europa Engineering offers a mirror with an “dim” setting that attaches with double-sided tape. It’s a very good choice as, when you are that low, everyone’s headlights shine in like high beams. If you do bump the mirror, the worst you’ll do is knock it off.