I now have a Garmin 76S that lives in a dry bag. We nuked three etrex legends in the '02 Worrell. Typically you could see liquid water droplets through the blue plastic. We did encounter electrolysis (to some degree or another) on all four of the units we had.

The next to last night I wanted to download the tracks from that day, however the contacts were so bad that I couldn't even jury rig a solution (was using foil from a Becks beer bottle to fill the holes, it worked on previous attempts). On the last day, both GPSs we were using died. One died one the water; the other one gave up the ghost on the beach. I really hate it to, because I would have LOVED to have the data from both those days. It doesn’t really surprise me though, because they got HAMMERED that day. Anybody still have their tracks from those two days?

I love all the features on the 76S and the big screen is GREAT! However I don't trust it to be any more water resistant than the Etrex.