Anthony - I am in a similar situation to you... looking for an IGH bike, except I don't have the IGH. I also want to be able to pull a bike trailer as my daughter will be going to day care in the Fall. And I live in Toronto!
Where did you test the Giant Seek 1? I'd like to give that a try. I'm also going to try the Trek Soho when the arrives in town. And I've been considering the Steelwool Tweed too. I have a Steelwool Sweet City now that I commute on and it is great, but not a good candidate to convert to an IGH bike.
The bike show is coming up next weekend, which may give you some other ideas.