Where do you live? It's likely that it's not worth coming to ANU if you're already living in like Sydney or Melbourne.
ANU doesn't limit you at all, it's more that by the end of your degree you might think that you might as well just join the public service since thats what the main industry you are going to be exposed to in Canberra is.
Going to University in Sydney isn't going to give you a huge edge when applying to a job except that you might have shred some paper for macquarie for a week while you were there. At the end of the day it's going to be how you go in the interview and how your grades are.
The decision should more be whether you think it will be more interesting to go to ANU or some other university, and like others have said all people here can really say about that is what they think about lecturers/courses at ANU. From my perspective, it has good quality lecturers for Law and Economics. Personally I haven't done any software engineering, but in terms of commerce lecturers I'd hope there are better at other Uni's.