Auto pilot

[Bloggsy]

I am considering fitting an Auto Pilot to my Barcrusher 670 I am using a Lowrance HDS Gen3 for navigation purposes. My questions are which kit would suit best as far as I can see there are 2 units available  LOWRANCE Outboard AutoPilot Hydraulic Pack or the more expensive SIMRAD LOWRANCE DrivePilot Hydraulic Pack has anyone had experience with these units Also as I already have a Garmin GPS antenna connected t the NMEA system do you use both antennas or only one and if s which one.

Thanks