Currently doing IR Politics in Melbourne. I may transfer to ANU for Arts/Law next year but that's not because I dislike the course. I actually don't mind the breath requirements for Melbourne because initially, I was actually tossing up between Commerce and Arts in Melbourne. I am an avid reader of anything to do with finance, particularly in areas of investing and stockbroking so I guess the breadth provides me with an opportunity to further that area of interest. I did end up choosing Arts because I think it complements the specific interests I have in law very well (international and constitutional law more so), law being one of the few career options that I can see myself in the future.
IR Politics from my experience so far is enjoyable. You do get a lot of guest lecturers, specializing in different time periods/countries in the international arena, thus changing things up so its more interesting. The lecturers and staff is also helpful, and a really nice bunch to be honest. I think its safe to say that from those I have spoken to, most find it to be a really fun course. I think its a good choice. Good luck to you wherever you go!