Thanks, had a quick look and think they are all aimed at off road.You can get free maps through the open street map project.
A quick guide to free OSM maps for Garmin GPS devices. - ScarletFire Cycling
Yes, you can use completely legal and FREE mapping on your Garmin Edge 800. Welcome to the OpenStreetMap, completely free maps for your GPS! The comes supplied with a "basemap" which isn't much use at all. It contains a basic routable map of major roads, but lacks detail. If you've got the money,…www.scarletfire.co.ukOpenStreetMap-Garmin maps | Maps Download
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