imported post
Garmin Nuvi 205 for me. Great. I use a RAM mount, which is secure, but not very adjustable. I actually prefer a simpler mount, but those require round handlebar bars. A freezer sandwich plastic bag and couple rubber bands form the waterproof seal for the Nuvi.
If you hook it to bike power, and use 100% of screen brightness, it is fine in sunlight. However, if you use internal battery, you have to dim the screen to get any kind of battery life, and then its hard to see in sunlight.
Peace.