I also use two Garmin 7612 xsv, and also could not be happier. Great setups, and the touch screens are great to use except when running, sometimes it can be a bit of a challenge when you are bouncing around.

For me they provide super quick zoom and pan on both charts and Sonar. I havent had any issues with the screen getting scratched in a year.
You know something bad is going to happen when you hear..."Hey, hold my beer and watch this"