I tried to get one from JB Hifi which advertised two dollars cheaper - but with $39 (I think it was) cashback from Acer. But there was only one listed in all Melbourne stores.
So Coles it was. Power supply is 19V and I have just checked and my 12V in DC-DC converter has a 19V out setting - beauty!
Started loading stuff last night.
Stellarium worked well. You can make it groan a bit if you turn on lots of things (constellation lines, borders, names, both grids

) but with just constellation lines (my usual approach), the view can be scrolled at a good speed.
Now to get a better virus stopper onto it. I didn't bother enabling the supplied Norton.
Now, I have to work out how to use DSL Shutter through a USB port, and also perfect connecting Stellarium to the Argo Navis unit.