Dick,
The sad part about the ADS-B implementation in Australia is that in a few years time all this expensive equipment will be obsoleted by the cheaper newer stuff. By upgrading now we loose the opportunity to spend that money on other things that could benefit safety to a greater extent
In the past few days Garmin have released an all in one transponder/GPS that is $3750US. Imagine what will be available in another few years.
Garmin® Unveils the Next Generation of All-in-One ADS-B Transponders | Garmin Newsroom
No_one