Anyone have experience with the Garmin etrex 20? I'm considering one - I have a used Magellan 310(I believe) that I paid $30 for...has worked great last two years Elk hunting - I basically just use to get elevation, mark elk sign, and back to the truck. But - the farther I venture the more I can see use of topo when trying a new area that I don't have a "mental snapshot" of...plus would be nice to know how close I'm getting to another road or waterway.

Opinions on importance of barometric altimeter?
Opinions on 3 axis compass vs magnetic?

Thanks!