So I got caught in a heavy rain storm and my $100. TomTom got real wet and started flaking out! So I went on the hunt for something waterproof. I found REI had a demo of the Garmin Nuvi 550 for $210. Also bought a Gamin scooter mount for $25. Got the Camera poi's for $5. and it's working well.
The mount has blind threaded holes, so I drill and screwed it. https://buy.garmin.com/shop/shop.do?pID=27927#