We use a Raymarine Wheelpilot with an ST 6001 control head, interfaced to our Garmin GPSMap 545 chartplotter via NMEA 183.
In addition, we have an ST60+ wind gauge, interfaced to the autopilot via (original style) SeaTalk.
This combination has served us faithfully for 8 years and thousands of Nautical Miles, although the wheelpilot is now showing some wear on one of the nylon components that can cause the clutch to pop open under load. For now, a small bungee cord cures this, but the parts are available online for replacement.