I like the 3-d feature of the e-80 but the rest of the features, video cams, linking more then one screen and the like are more geared to larger boats were a few thousand here a few thaousand there and your just talking about gas money right?
The refresh rate is better but the refresh rate on the c-80 is good and better then it was with the update last year. also navionics is updating again this year and you can mail in and exchange your gold card for a new one with better sounding and charts , also a lot more marina information,comes with phone numbers and radio ch, combined this with the soon to be released Navplanner soft ware, this allows you to use your card on your pc or laptop to plan trips right on the card instead of transferring the data, and you have a damm good system that will be hard to beat, w/ auto pilot.