Mark, you have to ask yourself. Where will you go next?
Unless you're really planning on remaining single and debt free for the rest of your life. 25,000HKD/month for a 400sqf flat in Central.
Think about: retirement (no pension, so you will have to be able to save money), China taking over Hong Kong and Air China taking over CX and KA in the long term.
CX and KA are only a stepping stone for most guys nowadays.
Living in Europe, I suggest you have a look at the majors over there earlier than later.