Or, another alternative, enrole into LAN's FFP. The benefits are even better than AA.
Of course to take advantage of these benefits, you've got to fly the home airline a lot, no good having these if you mainly fly QF....
Once past lifetime gold my suggestion is to get the minimum 1200 sc's to maintain QF WP, and if you're flying patterns allow go for star gold as well. Status in two alliances brings great flexibility....