Sydney would be my pick and i'd check out Sydney Uni or UTS (University of Technology, Sydney)
I go to UTS in Sydney and I study business - it is an awwweeeesome uni, such great people - everyone gets so loose!.
As an example, this is the amount of beers 3 of us consumed in 5 days on this years ski trip.
This year UTS Business, Law and Economics schools took out the Number 1 place for graduate employment rates (amongst all Sydney based universities) and we were at the top for good teaching and overall graduate satisfaction..
Also just achieved AACSB accreditation (putting the uni in the top 10% of business schools worldwide)
Obviously I hold a bias, many/most of the unis in Australia are of high standard, and if you get anywhere near the coast you would enjoy yourself for sure!