Not sure that these are they correct choice.
Jim:Depending on what you want the autopilot for, I am not sure that these external A/P are the correct choice for your size boat.Ed happens to have a H37C which, like most of the Cherubini's had a very netural helm. I think that the later models need a more powerful A/P unit. If you have to choose based on price, then the Simrad should do a better job. You are going to exceed the specs of the Autohelm 4000 with your boat and you will be close to the limit on the Simrad.