Booked F for me HKG-LAX next September (331 days out). Booked J for my fiancé. AS agent told me to call again closer to departure to see if more F award opens up for upgrade. We did a "test" and the agent looked at HKG-LAX F availability the next week and saw lots of open space (1-2 F spots) on multiple flights. Who knows what the situation will be next Fall, but I'm getting excited!
this will be my first CX F flight.
edit: total for me was 70,000 miles and about $85 in fees. Fiancé was 50,000 miles and about $85 in fees as well.