I am visiting Australia right now. Should I buy a OWE before April 15th, to get a lower cost and more possible segments?

My concern is that I won't have my actual itinerary worked out by April 15th. I suppose I'd have to book a fake placeholder itinerary, and pay a change fee later once I work out one I will actually use. But you can't change the first segment, right? I guess I could book the ticket through Qantas or AA in Sydney, which would be a better idea? Thanks for any suggestions.

[This message has been edited by benoit (edited 04-06-2003).]