If you dont want to spend a lot I wouldn't go Garmin. Most of the Garmin handheld units come with just a base map. Most map packs are $80 to $100. I think someone else mentioned, no Mexico topo maps. I've been using this app for my phone and it blows a Garmin handheld out of the water and for only $10!! You can buy more topo mapping for additional charges. The GPS app works with or WITHOUT cell signal. It doesnt bounce from a cell tower it enables the GPS on your phone to bounce satellite. The app works when you have absolutely no cell service and therefor works in Mexico. The only thing you have to do is before going out you have to download map tiles so the app can work offline. Track recording, compass, waypoint mapping, and a ton more. It is basically a $300 app in my opinion.
BackCountry Navigator
