One of the things that would help us to help you would be if we knew what boat you have. Size is important, and stern configuration can play a part - very few vanes are suitable for off-centre mounting, for example.
If your boat is under 30ft then the Navik is excellent. Dave is right, though - for bigger boats most people really rate the Hydrovane, and it can also be used as an emergency tiller. The Aries also has a very good reputation, but an only be purchased second hand now (although spares are available).
Have you had a good look through the sites listed on BlueMoment in the Steering section HERE?


