Second display to pair with Axiom Pro RVX

[brk]

Any Axiom display would pair well. You would not need to get another sonar-enabled model, as the first unit will share all sonar data with a 2nd (or 3rd, 4th etc) via Raynet. Just make sure they are connected via Raynet (ethernet), as sonar and radar data is not carried over the NMEA200 network. For just 2 devices, you can connect them directly with a Raynet to Raynet cable. If you are going to add more Ethernet-connected devices (Radar, RMK10, cameras, more MFDs, etc) then you'll wind up with an HS5 switch in the mix as well.