Looking into installing a new autopilot on our boat. I've always had Raymarine products and hope to buy theirs. Not sure which to look at but have been looking at the EV-100 and the EV-200. Not sure which would be a better fit. The boats a 34' single engine trawler weighing around 18-20 thousand. Would the 100 work or should I go heavy duty with the 200 ?