I flew FRA-HKG-SYD ; BNE-CNS-BNE-HKG-LHR on Cathay Pacific last year. The Frankfurt-Hong Kong leg was operated by a "74B", i.e. 747-400 with 389 seats. My seat was 67A. As I always take a window seat, 67A was a good choice because it´s not a "double excuse-me seat". You can put your legs between the front seat and the window panel, so there´s plenty of legroom as well.
Greetings from Schwäbisch Gmünd,