I hope Ken hAAmer enjoyed his flight. I wish I had been here last week, I could have provided some good information.
FWIW, last weekend the SYD-PER flights flew the aircraft as shown below. The option I would have taken would be the Sunday QF571 if available, these 767's (OG*) have the "dreamtime seats" in J class (with in-seat IFE), none of the others do. Also I avoid ZX's if at all possible as they are old crappy (ZXD is ex BA G-BNWJ) planes (eg no air vent control, basic J seats).
Sat 13th:
Flght Dep Reg Eqp
QF575: 08:25 EBD, 332
QF581: 10:25 VXB, 73H
QF577: 12:40 EBA, 332
QF571: 17:25 VXM, 73H
QF583: 19:25 ZXD, 763
Sun 14th:
Flght Dep Reg Eqp
QF575: 08:25 EBB, 332
QF581: 10:25 VXE, 73H
QF577: 12:40 EBD, 332
QF571: 17:25 OGB, 763
QF583: 19:25 EBA, 332
These have the following configuration in J:
332's: r1:2x2x2, r2-5:2x3x2, r6: 2xxx2
73H: r1-3:2x2
763: (OGB) r1-5:1x2x2
763: (ZXD) r1-5:2x2x2