I'm not at uni yet, so I'm not quite what you're looking for. But I applied for International Studies at UNSW as one of my preferences.
I know that the websites are an absolute pain in the ass, but its really important that you thoroughly read the course information on both sites. Don't assume that because they have the same name they're much the same course- UNSW and USyd have two fairly different courses named International Studies. UNSW's course is in the Arts faculty and is sort of language/humanities based, whereas USyd's course is in the Commerce/Business faculty, and has more about international business and so forth. Its also worth mentioning that International Studies is a fairly new course at the University of Sydney, and I'm pretty sure it's not currently available as a combined degree, unlike the UNSW course.
If the UNSW International Studies course appeals to you, have a look at USyd Liberal Studies (International) also.