Hi.  Haven't booked anything yet, but considered either arranging ourselves, flights Journey South America or going on inexpensive trip with Dragoman/ Imaginative traveller.  Would like to visit Rio, Buenos Aires (tango!), Iguazu falls, Torre del Paine national park, Tierra del Fuego and Ushuaia., maybe Beagle channel & Cape Horn.   Fantastic scenery and experiences.  Would have liked to add Machu Picchu but rainy season - will have to keep for another trip.