Dave,

if I have to fly four legs on the airline I am member with than Quantas makes no sense as I wont go to Australia too often. BA or CX seems to be my choice now, as it is very simple for me to fly with both of them regularly.
CX seems to be willing to comp the status if I "reserve" at least one F RTW, which is my plan anyway. Comes out to be so easy now!
Thank you all for your help, I really love Flyertalk. Itīs addictive.