So T.O. is only about a 5 hour drive from Montreal and I've been there many times, but it was only this past week that I had first opportunity to visit the Toronto Public Library's Merril Collection of Science Fiction, Speculation and Fantasy. I was fortunate enough to get a full tour of the stacks. With over 72,000 unique items, the collection the largest of it's kind in Canada with only a few private or University collections around the world that rival it. It is the only such collection that is open to the general public.
The collection continues to grow, adding hundreds of new items each year. To support it's growth yourself consider joining the Friends of the Merril. It's $35.00 well spent.