If you're going to study by distance Ed, then UNE is miles ahead of Macquarie and Southern Cross. This is mainly because about 75% of UNE law students are external and so the courses are coordinated with those external students firmly in mind.
In terms of quality, have a look at the faculty staff. The senior lecturers at UNE write some of main textbooks used in law schools in Australia (Eburn, Geddes, Imitiaz); UNE seem to be able to attract top quality and many of the faculty staff have additional teaching training (as opposed to the incomprehensible expert). The first set of UNE law graduates would have graduated about 2000, so they are too young to be High Court justices or SCs yet, but that is not a reflection on the quality or content of the law school program.
The reality is that your initial career in Law will be determined by your marks. If you get Ds and HDs then you can take your pick. If you get Ps and a few Cs, then you are part of the pack, regardless of where you study. So choose the place that will allow you to study well and obtain good marks.