Scoob E

Both units are good. I have a personal Vista and use a 76S at work. In trees the 76S, without a doubt, gets better reception, It also has a bigger screen, better baro features, waypoint averaging, and can take an external antenna. For me the only drawbacks of the 76S is its larger size and it takes longer to type in waypoint names. You'll be happy with both units, but the 76S is worth the extra cash.

On the same topic. Is it normal for the Vista elevation to fluctuate 2-5 feet every second or so when lying still on a table?