Hi, I am looking for a cheap and easy set up for my snowmobile, I would like something in the 4.3 Size. Most of the people I know and the posts I have read they are using regular GPS units and they are sealing them up for water purpose. Some of the Models I am looking at are Nuvi 265w 40LM 2495LMT 3490LM 1390 200 or 205 I would like to be able to add 3rd party trail maps and any mount info would be great also. I am not looking to spend a lot yet I want to see if this is something I will even use and how itll work. Thank you for your time.