I have heard that the price of around the world ticket varies greatly depending on the country you are booking from and that sometimes it is better to buy a cheap flight to another country and an around the world ticket for that country. From Australia (Sydney in particular), would it be worthwhile considering starting from another country, perhaps in Asia?
Being specific now, the current route we are considering is Sydney -> Dubai -> London -> New York -> Los Angles -> Hawaii -> Sydney. Of course, we may decide that's too much and simplify.