For me, it would be a toss up from LAX since you would be on the older SQ product through NRT and possibly on the newer CX one through HKG if you took the correct flight. Starting sometime in August, SQ will have their new business product on the A345 direct flight 3 times a week. In my opinion, this would blow away the other two options of SQ through NRT or CX through HKG assuming you can do the 17.5 hr flight.