Billionaire political activist George Soros, who spent more than $25 million trying to help defeat President Bush in 2004, has spent almost as much to keep a roof over his head on Fifth Avenue. The Hungarian-born financier just paid his ex-wife, Susan Weber Soros, $24 million for the 16-room duplex co-op apartment at 1060 Fifth Ave., which the couple shared during their 20 years of marriage.