I'm really quite surprised that Montreal lacks the same sort of rent crisis that other cities like the Bay Area (or Vancouver and to some extent Toronto) has. Apparently they've got a surplus of condos for some reason?
http://www.statista.com/statistics/443728/canada-immigrants-...
Québec is the most taxed province in all of North America too and salaries are lower than most other places. It's all relative.
However should I make more money, I'd definitely stay in Montreal. I think I'd miss walking around shopping for groceries, going to restaurants etc. I hate commuting in cars.