My family and I are new at geocaching and just started out with a eTrex Legend. I would like to upgrade to a unit with a high sensitivity receiver and paperless caching. The bells and whistles are not important to me as long as the unit is accurate, user friendly, and as previously mentioned paperless. I have been looking at the Garmin Colorado, Oregon, and Dakota lines. I would like feedback good or bad on specific units in these lines. I will be using the unit exclusively for geocaching, urban and wilderness both.