From 08:00 to 09:00 it'll be somewhat quiet for the "heavy" arrivals. You'll see a KE
arrival during this timeframe. Starting about 09:00, you'll get the initial wave of 74 arrivals from Asia. A couple of JL
, maybe SQ
, if the flight is early.
T-4 is a very good vantage point for spotting. It's situated near a set of taxiways that serve as the primary exits for arrivals off the 25s. That being said, you should get some nice shots of UA
's heavy from SYD
as it arrvies. T-4 is 'next door' to TBIT. You'll have a nice lineup of planes to view from the west-facing side of T-4.
Even with 3 hours between, venturing out might be somewhat risky, in that depending on the day of the week, the lines to go back through security can be time consuming. I'd suggest sticking with T-4, maybe venture over to TBIT and go to the mezzanine level (resturant level) for decent viewing.
Hope this is helpful!!!