Hi Nexus6
I recall someone called TeZzA who lives near your area, Undercliffe, Tempe way. I know he owns a few scopes, send him a PM and see what he has to say.
I live in Ashfield, which is not too far from Marrickville. That said, I don't have a scope, but do intend in getting one soon. I'm not too worried about seeing conditions or light pollution as I'll take it to the ocassional dark site when time permits.
I think if you see a lot of sky glow from lights then it could pose an issue. Fortunately my backyard isn't too bad from that perspective.
Good luck and welcome to the forum!