I'm just about to purchase a new unit, probably the Montana base model. Gotta couple basic questions. First off, I am correct that if I purchase maps from Garmin, any that come on an SD card can't be added to my computer? Only maps that come on a DVD will do that? Right? Second, this will be my first unit to have the capability of doing Tracks. When I'm following a track on the unit, does it display things like distances to the next turn, total distance to go, time to destination, etc.? I'm really used to Routes doing that. For the moment, I'm out of questions. Thanks!