Welcome mate,
Im Also in Australia, Sydney . Ive got a Blue 08 ISF, which is also a rare sight even on Sydneys roads.
Most of the peoples here like there HSVs, or BMWs. I can vouch for the JoeZ intake and Toms drop in Filter being a worthwhile mod. ive got both and im very happy with how my car performs.
Welcome to the forum and enjoy ur stay .!