I am a huge fan of Mirrycle mirrors! I recently bought both their road mirror (fits on STI brifters 2009 and earlier) and mountain mirror. Never have I used such a stable, clear, high-quality mirror. In the past I've used both Take-a-Look (glasses-mounted) mirror and the ultra-lightweight German mirror, but neither come close to Mirrycle. They really are a miracle!

http://www.mirrycle.com/mirrycle_mirrors.php

No affiliation, just a very happy (new) customer!