It's funny but alot of my favourite rappers are from Australia, there is some hot shit coming out of there atm.

Bliss N Eso
Spit Syndicate
Dialectrix
Drapht
Blu & Exile
La Coka Nostra
Nine High
mc chris (nerd rap :P)
Mystro
Roots Manuva
Tech N9ne
Immortal Technique

I try to stay away from the mainstream.. lol