Thanks for all the valuable advice guys. When I get around to booking a xONEx, I will just use AA for a segment such as MEL-SYD. This seems to cut the amount of taxes/surcharges by atleast $1300 according to prices quoted on the QF website, and probably more than this. Once again, thank you so much. For the record, QF website tool does circumvent other systems, and makes you book through QF. For example, I experimented with a AONE3 ex-ICN, and it quoted me the same price (albeit in KRW) for a AONE4 ex-Aust......