I've had the 705 for 2 1/2 years and it's still goin strong. It's loaded with maps for all of north america on the removable memory card. I've been thinking about also getting a edge 500, but just because. Not because the 705 doesn't work. The 800 has a touch screen I think, which might be a cool feature. I really don't use the maps that much though, but they are nice to have.