Hi,
I'm only going to restate previous posts I think but, I bought the 12" as I don't intend to transport it. I live in under dark skies so there's no problem.
The 10" is significantly smaller all round (portable) - scope and mount. So, if you have to leave the house, get the 10. The difference in aperture between 10 and 12 is not as significant visually IMO under suburban skies as others have stated (dark skies is another matter - ie perfect telescopic conditions).
The Crayford focuser is a major plus too and you're in QLD so the fan would be a plus, therefore I would go for the 10" deluxe at $699 from andrews.com if you have to transport.
Also you have the option to mount a 10" a lot more easily than a 12 down the line.
But... if you just intend to drag it out now and again, get the 12!
I don't know if this helps but I hope it does!!?
Bottom line: I've enjoyed both scopes.
Cheers
Doug
