There have been loads of nice builds here, and the latest one by Taylor fits nicely into your budget. If you don't like the case then get a case that you like. As long as it's atx it will be compatible.
no kidding. Take initiative and look at some aussie sites and find parts. Once you find all the parts you think will work together, and then repost for us to look at. Don't just expect people to make a system that is perfectly suited for you.