It's easy, don't spend the money on the preferred seat.

Just think about it - it's only a few hours on the plane, and there are fantastic places to go, things to explore, and food & drink to enjoy in Sydney. Save the few dollars you'd spend on a preferred seat, and you can have an extra nice dinner in Sydney. There are some great places to eat there, and the weather in March should be perfect.

So: save the money, just sit in a regular seat on the plane, and spend the flight thinking about Sydney. Here are some pictures from when I was last there, just to whet your appetite:



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(Now think about your reaction, when you read all the above. If reading it made you nod & agree - or feel disappointed, because you really wanted to sit in a preferred seat - then you have your answer)