After just purchasing a 1977 Hunter 27, I am looking to add some electronics, a tiller autopilot, new VHF, depth finder and GPS. I am looking at the Raymarine systems, I would like it all to communicate without any major problems, anyone have any input or suggestions? My handheld GPS is a Lowrance color iFinder H20, and I run Navionics gold chip in it, very happy with it, but Furuno and Garmin have lots of interesting stuff available, but (as far as I can see) no tiller autopilot....