Thanks, Tony and Dunk. I guess there comes a time when you can over-think all of this and become bamboozled with all of the options!
I think two scopes, a frac now and a reflector (later?), seem to be the go. I live in West Hobart and I have cross-city views (clear horizon to the east only) so seeing is pretty restricted. I have to journey to the AST observing site (part of the UTAS radio telescope facility), a nice spot, but with TWO scopes? Part of the fun, I guess!
Cheers,
Richard