My preference is the forward rows of Upper Deck Business. It is a very quiet section of the cabin, nothing forward except for the Tech Crew and a Toilet, the galley is down the back. The front rows do have slightly narrower side bins for your bags, but between the overhead bins, the window bins, and the the large coat rack at the rear , there is plenty of room. You exit the aircraft with lower deck Business and before the Economy pax, so there are no real delays. Only thing better is First (fortunate to have travelled in Cathay and Malaysian First), and the Qantas First lounge in Sydney is exceptional.
Enjoy you trip Adam.
Qantas 747 Business Class Upper Deck
Qantas 747 Business Class Upper Deck
Qantas 747 Business Class Upper Deck
Malaysian First
V Australia Business
V Australia Bar