Southern Chile would be the absolute farthest i would be willing to go. Dunno about you, when i think about cold climates during Northern Hemisphere Summer time, i think places like Siberia, northern Scandinavia, the Arctic, Antarctica, etc. I definitely can't afford to go to any of those places.
I've been to Peru, and while i enjoyed my time there, i don't have anything close to burning desire to visit again.
I know it would we Winter in Chile in June and July, that's the point. The colder the better. -20*F would be ok, though i'm not prepared for much colder than that. I'm one of those odd people who like the cold.
This trip is the best substitute for my ideal/dream trip that i'll likely not ever be able to actually do unless my life changes radically, a late winter/early spring trip to Brooks Range in Alaska. I just don't have the time during that time period, but i do have the summers off, so that's where i am, trying to find a colder climate substitute.
Greenland looks interesting, but having watched a documentary where even in northern Greenland above the Arctic circle the explorers in May were experiencing treacherous conditions on the glaciers because of melting snow/ice and numerous crevasses being revealed.. well don't think i want to deal with that in June and July when it would be even worse.