Thanks for the information.
So if you wanted to add autopilot now with your VX2 system, it would be best to go with a Navpilot 711C, as it has NMEA0183 input/output ports.
If you were going to update your MFD's now to a TZT2, you could use the Navpilot 300 or 711C because they both have NMEA2000 ports. Navpilot 300 is primary only a NMEA2000 autopilot.