Might be a bit late, but my two-bob's worth...
I have bought stuff from all the Adelaide suppliers over the years.
Matthew at T&A is helpful and is usually cheaper because he doesn't have a store to rent. A bit hard to "try before you buy" though...
Adelaide Optical have a number of scopes in stock, so you can look at them easier. Shell-lap likewise.
Shell-lap and Adelaide Optical are the only
stores in Adelaide that can really help you, and that know what they are talking about. Their prices aren't overly cheap though.
Claude in Cleve specialises in Takahashi, and knows his stuff. He will match/beat prices for a number of other brands too. He likes to have a chat when you ring him, so be prepared to have a comfy seat.

Have fun looking!