[CA] Upgrade Autopilot

The Raymarine package I have on my Mainship Pilot 43 consists of dual E80 displays, with a ST8001 Autopilot. I’m looking to upgrade my system to the Axiom 9 or 12 MFD, with a either an EV-200 or EV-400 autopilot.

Q1: Which autopilot system should I use?

Q2: Can I use the installed drive unit?

Thanks, Dave