Recently bought a Garmin Edge 800 for training duties. Went for the performance bundle thinking I could pick maps up at a later date. I now think that was a mistake and should have stumped up the extra £50 for the Discoverer GB map when buying the unit, didn’t realize the maps was £180 by itself.

So what are my other options for decent mapping with the Garmin, what do other people prefer? I use a Mac if that makes a difference.
cheers