I would say:
1) UNSW
Pros: Employment rate 96%, $41000 starting salary on average; American report showed it to be the best Uni for Accounting, highly regarded in the Asia/Pacific region, one of the top Universities for research, OK if you're doing a cadetship, highest recruitment for the big 4, the prestige of the Uni itself, generally regarded to be the most prestigious commerce degree.
Cons: None for the degree itself, but can be a pain in the arse to travel to for non-easties.
2) Sydney
Pros: Employment rate 93%, $37000 starting salary on average; Economics and Business faculty very highly regarded esp. the faculty of finance, the only ungraduate degree at a University in Sydney to have the prestigious qualification of being accredited by the AACSB, you can do three majors, flexible degree allows you to take units from other faculties and customize your degree to your desired career path, one of the top Uni's for research, the prestige of the UNI itself, generally regarded to be a close second behind UNSW and if you are not doing Accounting there is probably no difference.
Cons: Very bad for cadetships due to inflexible timetable, perhaps regarded as too theory based by some employers.
3) UTS
Pros: Great for people who are doing cadetships as it's very flexible, regarded to be a very practical degree, graduates from B Business City usually graduate with work experience under their belt which makes them more employable, in 2003 the Big 4 actually recruited more from UTS than from Usyd (though it is likely the majority of those recruited had done cadetships).
Cons: Doesn't have the same prestige as UNSW or USYD Commerce degrees or maybe even MAQ, not so highly regarded for research, if you're not doing a cadetship UNSW and USYD are probably the better options.
4) Maquarie
Pros: Well regarded commerce degree. Supposedly very good teaching quality; one of the lecturers (Alex Malley) is president of the CPA NSW (thanks Grizzly). Offers specialised degrees. Research reputation not bad. OK for cadetships.
Cons: Lower starting salaries and higher rates of graduate unemployment than UNSW/USYD, doesn't have the prestige of those two Uni's, work experience is not as emphasised as UTS, specialised degrees are inflexible as you must conform to strict patterns of study, distant fourth in numbers recruited by the Big 4.
5) UWS:
Pros: Regarded to be a pretty good commerce degree.
Cons: Doesn't have the prestige of those four aforementioned Uni's, few graduates recruited by the Big 4, any of the fours above Uni's are probably superior.