Yes, it will be a step down - but then again, SV has the strongest tech scene in the world, so pretty much anywhere would be a step down!

That being said, these will likely be of interest to you / get you familiar with who the players are in the startup scene in Canada:

http://www.techvibes.com/toronto/category/start-up-index

http://startupnorth.ca/index/index/

http://www.canadianinnovationexchange.com/

https://uwaterloo.ca/jobmine/employers

https://uwaterloo.ca/hire/

http://waterlootechjobs.com/en/

http://www.techjobswaterloo.com/

http://www.communitech.ca/