Originally Posted by wanaflyforless

There are a lot of variables, but I agree AA would be good option for you as miles don't expire (so long as you have account activity every 3 years).

I do not recomend Qantas as their awards tend to be less competative.

You may want to consider CX Asia Miles...
disadvantage verses AA: miles expire after three years
advantages over AA: you can upgrade on BA/AA/CX for less miles than a free ticket...may be a good deal for you as you will flying less.
And...if you ever fly BA transatlantic you can't earn miles with AA (anti-trust rules). And Asia Miles also give you the option of one-way awards for less miles than roundtrip.