Depends on your objective. I simply wanted one to help facilitate decisions on the trail....not necessarily for marking waypoints, etc.... I bought a Garmin Nuvi 66LM as it came with US and Canadian road maps, and I could make the size work on the sled. Also, I bought the Quebec Trails from Trakmaps. On our recent Gaspe journey it worked very well and helped save time (vs. getting a map out often) and a few intersections with no signage, it really helped. It will also log trip statistics an