Hello I have a question, I live in chilliwack bc canada and came across the backroad map book SD version for Garmin gps. I'm in the need of a gps for my truck anyways and would like to be able to use the SD version of the brmb. Does anyone have any recommendations on what garmin gps would be the best for offroad use? I took a look at their site and it's kind of hard to determine what options a gps should have and whats over kill. Thanks for taking a look.