Congrads on the choice; the 125i M sport is the one to have (my opinion)
What colour and trim did you order?
For Zen's info, I am not sure what local taxes are in Sydney, my (expected soon) 125i M Sport was ($68,440 on road incl GST) up here in Brisvegas (after much haggling).
Be prepared to push the hard line, they are concerned over Merc offering incentives for people to put their name down on a A class. They initially tried to get 73,690 out of me. Mention that you are also interested in the new Merc A class if they do not play.
The 135i is available in Aus (advanced order), however the cost sheet showed a near $13,000 difference when the same items are included.
125i M Sport
M performance extras