Geoff
Since your Australian you should check out the Jaggad range
The Monsoon I've got is totally waterproof and windproof, the one thing I like is the close cycling fit due to the stretch fabric, its not bulky like other waterproof jackets I've seen.
http://www.jaggad.com/au/product_info.php?cPath=1_27&products_id=55
Also the Invest Jacket is great if you want a waterproof and windproof vest as well
http://www.jaggad.com/au/product_info.php?cPath=1_27&products_id=40
You should be able to find these quite easily in Sydney.