Wirelessly posted (BlackBerry: BlackBerry8530/5.0.0.1030 Profile/MIDP-2.1 Configuration/CLDC-1.1 VendorID/417)
For 20K more AA miles (100K vs. 80K), the OP could also fly EY F LHR-AUH-SYD -- and even stop over at AUH, if desired. And I believe that EY F includes free limo service to and from the airports.