Furuno has a good quality
autopilot now which you should consider if you desire to have their nice radar/plotter/gps as well.
BTW Autohelm is a brand name and, although many people have used that brand the name is not actually synominous with the word and meaning of autopilot. Just ask any
commercial vessel operator and they would not probably even have ever heard the name Autohelm, which makes "toy" autopilots compared to the quality and
power of the
commercial ones.