In general, eTrexes are good all-around GPSs--small, rugged and easy to use one-handed. The screen is a little small for map-based navigation, but okay for the actual GPS functions. I'd recommend the Legend over the Vista because it skips the barometric altimeter and compass, simplifying it and extending battery life.

The HCx editions have good processors, so are the best of the old model lineups.

I know nothing about the new eTrex lineup other than the obvious--complete redesign around big screens (are they touchscreens? I can't tell). Unless you can get a screaming deal on an older model, I'd probably consider a new one.

Cheers,