Most RTW tickets don't make that much sense to me. I can usually piece together better deals myself. I'd look at a Biz deal out of Asia, to Europe or maybe Africa. Then find a Africa-Europe-South America deal. I'd think you could find deals for about $4-5k in Biz class, if you're not too pick on your carriers. It will take some real work, as many of the good biz fares are available only from travel agents.