Actually where is the AC and CX lounge located?
I used the JL F Class lounge and really like it. Had a good curry and soup there. IMO food is one important factor at the lounge especially for night flights as I appreciate the flexibility to eat before you get on the plane and if the food on the plane is not good at least you won't go hungry and if it si good you can pig out.
I understand there is also a QF lounge as well (Althought only a QP and not a F Class section)