Holsworthy
It doesn't get mentioned much. As ULTRALIGHTS mentioned, land is there, aligned for a 3rd runway Sydney. Centrally located. Easy to put in a short high speed rail link between airports with connections to anywhere else on the rail system. M5 feeds into it. The military could easily be moved to that large base they have near Cobbitty and still have rapid response for Sydney from there. Bankstown a/port shouldn't interfere and could also be linked. Seems like a no brainer. Am I missing something??