Originally Posted by Cathay Boy

Depends on the way you travel.

If you are traveling in J or F, there's little incentive to keep flying CX simply because of op-up, J --> F op-up is rare. However, if you got to DM by flying mostly Y, then I would say sticking with CX might be worth it due to higher chance of op-up as DM.

Otherwise, definitely get *A Gold, it opens up that much more opportunity for you as you fly other airlines.