Australia and New Zealans Travel Advice?

[Touge_Monster]

Hey guys, I know you guys aren’t travel agents but I was just wondering if any of you guys could help me out a bit. I’m planning on spending a week on the southern island of New Zealand and a week in Sydney and Melbourne. We have some basic plans like Milford Sound and the Sydney Zoo but I was wondering if any of the locals had and input on what we should do or see. The trip is planned for the first 2 weeks of October (incase that matters). Thanks in advance for the help!