I do love The Herd, one of my favourite hip hop acts regardless of nationality. I think I introduced you to them in the live hip hop thread so it's cool to see you kept digging further. I was a bit worried that lyrically, a lot of the more specific references to Aussie politics would put you off.
Summerland is my fav Herd album, I really dig the full time female vocalist they brought in.
Hilltop Hoods are another solid aussie hip hop act, sadly they've adopted a very Americanised style and lyrically they're a bit bland. But some great party music.
And lastly, I've only just encountered Phrase on the radio but his single is pretty damn catchy.