As far as weighing courses up, it comes down to a number of factors - quality of teaching, quality of students, number of students and hence opportunities to learn, resources available, and convenience of access, with different requirements for different people. Ultimately, you take what you can get. No school is perfect, and no school in Australia will be terrible.
Date of med course induction is a most useless measure of anything. As far as the concept of "prestige" goes, we're talking UNSW, UMelb, Usyd Sci/MBBS, but then again, that counts for very little now, although it may well carry its weight starting from 2011/2012 when the number of interns will grossly outweigh the number of Trainee/Internship positions.