Ah.. I did not know that only 1 transcon is allowed. Didn't see that in the OWE rules page. Can you point me to where it states that? Unfortunately, my schedule only allows me to fly Asia-Europe-NA-SA-OZ-Asia.
Also, I'm debating putting my miles in AA or BA. I already have an account with CX, but it's only a green card. I think for me, BA emerald status benefits me more as I can then use the AA Flagship lounges in the future even if I travel on domestic flights.