Seek comments: Raytheon autopilots
The Raymarine 7000 and 6000 are both very good reliable pieces of equipment. . They both do a great job under sail or under power. I bought the 6001 with 150 corepak. I am delighted!
(I bought at www.everythingboatsforless and made out real well too).
What type of seas do you usually navigate in?? How heavy is your vessel?. These questions need to be considered when making the determination as to which system is best for you.
Regardless, go with Raymarine. You will be very happy I am sure.