Use will be in USA and Canada. I am looking for a mobile mapping system / GPS system for my mobile office (motorcoach). I have been thinking of possibly a GPS receiver to plug into my notebook and mapping software installed, but it seem it may be too clumsy to use while driving. Any recommendation on software and receiver? If not that, who makes the better dash system mobile mapper with GPS? It needs to be accurate and have maps up to date, or at least upgradeable.