I'll post here when I get it -- I'm not an expert on Canadian duties, so it may have been foolish. I probably should have investigated it, considering I could have easily just had it shipped to a US address while I'm travelling there (and legally carried it back). Too late now, it's ordered. Live and learn.
Also for anyone's reference, I ordered from LL Bean in Sept 2012 (bought US-manufactured goods), and they calculated the tax directly on their website when I was checking out, which is a big plus for me (makes life much easier).