minimums for canoe camping IMO:

...color screen, they're too cheap not to
...hi-res, same reason, will blow away your old etrex experience
...hi-sensitive antennae, you'll need it for satellite pickup in treecover
...leave "tracks", but I think they all do now

lastly, and most importantly, before you buy, look at and use their software and maps for bwca and quetico.  who will sell you map upgrades and will they be available?

Gonna sell my Garmin gpsmaps 60c
was planning on the gpsmap new 62 series

jumped on the blowout garmin colorado prices....its nice, but i should have went with the gps62

IMO only, you can't find another machine to hold a candle to garmin.  I've used most of them.