Will edit over time and add stores as recommended by fellow posters.
Halfsleeve, Surry Hills;
store.halfsleeve.net (10Deep, mishka, Imperial, Herschel supply)
Supply Store, Darlinghurst;
www.supplystore.com.au (supreme, neighborhood, visvim, original fake, white mountaineering, head porter)
Incu, Paddington and Galeries Victoria;
www.incuclothing.com/shop/ (APC, wood wood, norse projects, clarks originals, band of outsiders)
Capsule, Darlinghurst and Centrepoint westfield;
www.capsulestore.com.au (Obey, huf, sperry, mishka, 3sixteen)
www.footage.com.au/blog, Footwear from Adidas to Grenson.
Harrolds, Centrepoint westfield;
Mens high end fashion (CDG, Rick Owens, Julius, Damir Doma, Thom Browne, Common Projects)
Updated: May 5 2012