Thanks Shawn, so I'm now looking at upgrade steps and with all the hype that's going around about viruses the NZ$ has absolutely tanked, so am thinking maybe doing the upgrade in a couple of phases...install ADSB-Out (probably GTX335) and smaller stuff this year and then replace the screens and do ADSB-IN when the exchange rate returns to a nicer number. Soooo now for a bunch of silly questions...

Is the SV-EMS-220 compatible with E*3500's? What about SkyView Network components? My gut tells me they're not, but I've gotta ask
How deep are the AF5x00 screens?
How do I get a better copy of the AF-5000 SV System Diagram that's on page 12 of the AF-5000 Installation Manual?