WTF?? Give us a bit more info/criteria to help u out - ie which one your clsoer to, if transport is an issue, what u wanna major in, whther u want a 3 or 4 year course, research based degree? etc.
I have a friend who got accepted to UNSW, but according to him its much better at USYD. Same applies for me, but I'm not doing the advanced course. We're both hoping for a late round offer to USYD.
I think all three choices are respectable. All undergrad science degrees are the same. Employers are not going to give a job to someone just because of where they got their degree. If you decide to do Honours (4th year), it is then the Class of Honours that will determine whether you get shortlisted/interviewed/offer.