Originally Posted by
SAtransplant
...So, the question is what's the biggest bang for the buck can I get with my miles, travelling in at least J class?
I don't know if it is the biggest bang for the buck but 80K AA miles for J between anywhere in NA to anywhere in SA (or v/v) sounds like a good deal to me. You could even fly as far as Hawaii-(US)-EZE/SCL return.