Oh - you mean down south ?
You'll probably still find that the various shops will stock different brands and none will stock all brands.
I believe either Specialised or Trek only permit 1 dealer per town.
Having said that, most LBS should at least have a range of different types of bikes (racer/tourer/cyclocross) for you to consider before you get to the trial stage.
Once you have chosen your type of bike, get on CC, do a Search and read !