I am looking for a gps that I can put in my car and on my ATV but I want a nice size screen. It would be nice to see all the place you been so I am asking the experts!
I use an Oregon 400t in auto and on ATV (with a RAM Handlebar mount) and it does very well. I would suggest the Oregon 450 with its improvements over the 400t. If you want a bigger sceen then the NUVI 500 and 550t are more rugged than other NUVIs and are waterproof.
On my ATV I use the 500 with a cradle and power from the ATV battery.
Works great.