I see that this thread is staying alive, and now I can add some comments too.
With a major trip planned this year on our motorcycle, two or more weeks as far south as Palm Springs and Phoenix, I quickly realized a gps would be most beneficial.
After a couple of weeks of research and a decision near, Costco jumps in and puts a Nuvi 2455LM on sale for $110 delivered. And it's CR recommended!
One Garmin Nuvi 2455LM please.
It was delivered yesterday and today it took me across town, successfully!
Gotta love that.
Mounting it to the bike will be easy, and if it rains, a ziplock baggy solves that problem.