Having lived there for 14 years and 14 winters, I would not buy anything in Australia.
It's all wrong here. It might be more expensive in Scandinavia but it's right for there. Both fashionably and practically.
Essentially you need a super warm outer garment that is also easy to remove and hang. You hang often when you go indoors. To a restaurant, to a museum, to the office, to a bar, to a friend's home etc etc. It's the norm. You might have to pay a fee for the service. Then, once indoors, you'll have +24 degrees or so - so light clothing only is needed.
But back outside!! There's cold there that can chill you to the bone.
All my Swedish and Finnish purchased jackets are far too warm for an Australian (Melbourne) winter! But were absolutely needed in Sweden/Norway/Finland in their winter.