^ lol'd
UNSW is by far the best choice for Business you can make. You should also take a closer look at UTS. I find a lot of people underestimate the university as a whole. Their learning process is entirely practical as opposed to theoretical/academic which means you learn more from experience rather than the textbook. In 2007 (or more recently, I can't really remember the year) an Australia-wide survey found that 90% of UTS business graduates were employed within 3 months and earned ~$80,000+ as opposed to the average ~$50,000 that most graduates would be earning. I think it's definitely worth a closer look at, although UNSW is probably where you want to be.
In your list I would easily wipe UWS and USYD away. USYD just doesn't appeal to me; it sells it's own pompous, pretentious, prestige in their open days and quite a few students I have talked to from other unis have transferred from USYD because they hated the environment and their teaching is very un-interactive and boring. I've been to 3 open days thrown by USYD and made a lot of effort to try and find some reason to like it other than it's Hogwarts-like campus but really, it has no appeal and there are a lot of rumours/innuendos floating around about how some of it's faculties are getting worse and worse.