rocks. I've had a handheld for years and when it came to kit out the boat went garmin the whole way for exactly the same reasons.
We are getting that Standard horizon radio to integrate with the new chart plotter ( 4012 ). We just need to hook up the garmin autopilot
sensor which should give us a good reliable system once all connected. We still have an old furuno
radar and sounder so most likely wont get new just yet, if we ever do. We will try and hook the sounder in via the nmea
It will be a lot of installing work but i think it will be worth it to have the fully integrated system and by the sounds of your success and satisfaction we've done the right thing