I've booked an LONE4 for September (ticketed by AA).
I have enough points to upgrade one of my long haul QF sectors to Y+ or J. The QF site will let me do this.

Should I? If so, which sector?
SYD-LAX (QF11 Sep 4)
LHR-SIN (QF32 Sep 23)
SIN-MEL (QF10 Oct 2 [connecting from JL721])