I was thinking of purchasing one of these units, mostly so that I can navigate myself better from cache to cache. The only GPSr that I have right now is my trusty Garmin Venture (the yellow one) without the maps and I have a bad habit of driving by caches because I'm focused on finding the one that I have my mind set on finding.

I've looked at some of the specs of the Nuvis and I find them somewhat confusing. I'm thinking of the 700 series, but there's so many models I have a hard time deciding what's best.

Any hints?