Patrick, your route through Chile looks excellent. You are def seeing the prettier half of the country although the dry north has some amazing sights. If the volcano across the lake at Puerto Montt isn't smoking you can climb up and take a look. It's one of my favourite Chilean towns, has a bit of a German mountain village feel.
San Antonio wine region between Santiago and Valparaiso is one of the favourite stops :-) In Valparaiso, the house of Pablo Neruda is quite interesting if a little touristy on weekends. Fascinating collection he amassed.
