Figure I'll bring some closure to this thread by telling you what I ended up buying. I went to the LCBO that was just a block or two to the east of Queen's Quay and Yonge. Overall I was impressed; it was a large well-stocked liquor store with a great wine department, good spirits selections, and a respectable selection of behind-the-glass high-end whiskies. The bourbon selection was very vanilla compared to what I'm used to getting in St. Louis.
Unfortunately they were out of the Green Spot and short of ordering 6+ bottles, I'd have to pay for a store to store transfer. Not quite worth it, especially considering that I already have a bottle of it in the bunker.
Anyway, I ended up buying a Forty Creek Double Barrel Reserve, two 375ml plastic flasks of Alberta Premium (since this was all destined for checked luggage) and a 200ml bottle of icewine.
Interesting and rare-to-me stuff that I didn't buy included Alberta Springs 10 year-old, Glen Breton Canadian Single Malt, Locke's 8 year-old Irish Single Malt, Greenore Single Grain Irish, and AnCnoc 12 Year-old.
Finally, at the airport duty-free I picked up a Crown Royal Limited Edition and a Gibson's Finest 12 year-old. (Though I was awfully tempted by the Black Grouse, I'm hoping I can track it down locally.)
All in all, it was a very Canadian haul, and all whiskies that I have never tried nor can I buy them at home. Thanks again for your comments and advice. -Jim