I want to read up on and look at the base map for the Edge 800 to see how accurate it is. I've got a GARMIN GPSMap76c (might have the model name wrong) which allows me to update maps for different regions (I haven't used it in so long now that I forget how to load and unload the mapping). If the Edge 800 has that level of street maps, and does not lock you onto the road by default, then it might be good. The price is the biggest barrier right now though.