Currently seeing 2 SYD-LAX for 9/3 in F on an A380. Includes legendary SYD F lounge access and offers 8 course tasting menu that you don't get ex-LAX.

I randomly saw 2 LAX-SYD F seats on an A380 for departure 8/31. Put a hold on AA.com ,but decided to route CX F through HKG instead as I found some seats and released the QF seats. Within 10 minutes the 2 LAX-SYD F seats I dropped were booked by someone else.

QF does not release seats close to departure, so you have to be prepared to snag the seats if someone cancels, which does happen. Consider using EF, so you can call the second your seat alert goes off.