Hello,
I am new to GPS and Geocaching, I have purchased a Garmin Vista HCX and have been using it to do my first few. It only comes with the basemap and I would like to upgrade to a better mapping system. I have been looking on the web and it would seem that the Garmin Topo is popular.
Is this the best mapping to use and if so is it better to get the CD or SD card version.

Thanks.