jnb-hre-nbo-sez-lhr-dxb-lhr-HEL-lhr-LAX-SXM-jfk-lax-ord-mia-jfk-scl-ccs-scl-ccs-scl-jfk-HKG-khi-HKG-khi-HKG-akl-per-syd-akl-syd-jnb

98k miles (140k+ q-miles for F class)
[note great circle recognizes SEZ as somewhere in USA)

plus all the bonuses, you will get 350k with AA.
assuming you can shell out 140k in CX F from US-JNB.
this is what you get:
A. 210k net miles with ~~$4000,
vs
B, 350-400k net miles for ex-USA with >$9000.
if you have time, it is cheaper to do ex-JNB twice than doing ex-USA once!

[This message has been edited by pegasus8228 (edited 12-20-2001).]