Hi Everard, I would take it one step at a time and concentrate on visual astronomy for now. With your budget you can get a very nice visual setup that will make the most of your dark skies.
I would recommend spending 1/2 to 1/3 of your budget on the telescope and the rest on eyepieces and other accessories.
I would recommend a 10" Dobsonian (should cost < $800) + good set of eyepieces incl. a barlow, telrad finder. I know you wanted goto but if you buy a $1500 goto scope, most of the money goes into electronics, not the scope. A Dob can be outfitted later with object locator computer.
But everyone is different which is why if at all possible you should attend a viewing night (or two or several) at a local club / or group. It will really open your eyes to what is available and give you a feel for the different telescope and mount designs. They all exist for a reason, they each do something better than any other. ASV and/or the ASSA are good points of enquiry. If you could make it to Heathcote on Dec 16, for the xmas Starbeque, that would be the perfect opportunity to see lots of scopes of different designs and sizes. See
http://www.asv.org.au/ for details.