dude thats a tuffie..depends if you want full hospital as well, or just the extras cover for things like dentist, physio, glasses etc.
If your reasonably healthy and don't do anything too dangerous in life (like ride fat bikes), maybe just extras are the way to go.
In an emergency you'll always get treated at either Flinders or Royal anyway.
I have Medibank Super Extras, dont know how that cover compares to others though.