motorcycle travel to southern Argentina & Chile

Nov 11, 2003
To all,

I am planning a trip to southern South America, including Argintina and Chile all the way to Tierra del Fuego and back up. I am also looking for a GPS unit that will stand up to the elements (water, wind and dust/mud) and vibration. What unit or maker is recomended for thier unit and maps? Does anymaker have detailed GPS maps for this part of the world?

Any help is appreciated.