AIS 650 with Plotter E80

Hello my name is Federico Katzenstein, and I´m from Uruguay. I going to US next month and want to buy a Raymarine AIS650.
In my boat I have a Raymarine E80 multifunction display (plotter) with VHF RAY240E.

Is it better to use the VHF antenna that I have in the boat now or is better to use an antenna only for the AIS (with a splitter)?

I want to know what else I need to buy to connect the AIS650 (wires, plugs, antenna VHF?, etc), since the boat is in a city in Brasil where I don´t have anything of those accessories.

Also I want to know if the AIS650 is compatible with newer raymarine plotters.

If I want to change my E80 plotter wich one you recommend me , compatible with the other things I have in the boat:

Packs: Electronic Pack 2006, ST60 Tridata Wind, ST6001 autopilot hydraulic +
Wireless SeaTalk autopilot remote controll - Smartcontroller Kabellose,
Radar 18´´Radome Mast Bracket, radiotelefon RAY240E Klasse D-DSC
Dark Grey,
Raymarine E80 Multifunktiondisplay (Netzwerk) + NAV Navionics Platinium Card,
Digitale HD Soundermodule DSM300 + Bronz HI-PER B258