South America definitely, I would head north first to Iguazu then, if you like wildlife, it should be (allegedly) almost the ideal time for Brazil as the rainy season should be finished and the mega national park in the middle/south of the country, the Pantanal, will be drying out. Across to Paraguay - Bolivia - Peru - Chile before drifting slowly south following spring to Puerto Montt, Chiloe and the Car. Austral. Then, make your way around the many places worth visiting in Patagonia. It should now be about time for the whales in the Valdes and the Viedma HU meet before checking out all the bits that you missed on the first circuit. I´m at present on my 3rd visit to SA and I still haven´t been to Brazil. You may have noticed that I didn´t mention Ushuaia, thats ´cos I think it´s a dump, also the north, Colombia is really nice, but it means going through not so nice places to get there but each to their own. Along with sub equatorial Africa, sub equatorial America is just about my favourite place. Ride safe.