Hi Anthony, and welcome.
Yes, the Bintel scope you've selected is a very good option. (Reselling in Sydney ought to be pretty easy, too, I would think.)
As you say, Dobsonian mounts don't lend themselves to astrophotography, but I've never heard of anyone getting into astrophotography and staying satisfied for long with their first few set-ups.
But first thing you should do is join a local club and try out some OP's before you trot down to Bintel.
Cheers.
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