I think that you'll be happier and healthier in Melbourne. Rush87 is right, Manhattan is a bit of a hole, very materialistic and blase.
Melbourne is smaller and more laid back, which is why I say that you'll probably be happier. But there are more opportunities (career mostly) in NYC.
Melbourne is smaller and more laid back, which is why I say that you'll probably be happier. But there are more opportunities (career mostly) in NYC.