nooooooooo, you can not miss Patagonia.
I can't wait to go there. Was at a South America evening in STA Travel and I won a Patagonia dvd and after watching it I wanted to go more than ever.
I will pm you a link for a 2 week trip that starts in Santiago and finishes in Santiago. I am planning on following that route but doing it on my own back and not with this company. But it shows what is possible and it looks amazing.