If used is an option for you then you'll want to look around for used Bryston amps too. The ST models of 10-15 years ago generally come up for sale quite often. In my opinion they're excellent value as their design and sound quality is substantially the same as the current models and there should be enough of the transferable Bryston warranty left to cover any minor issues that may arise. If you're looking at a 4BSST2 then I suggest also looking at the 6B model. It's actually 1.5 4B's - in other words, 3 channels of amplification. That would drive all 3 of your front channels which is important for HT.
Another option would be used or new Parasound amps. Not Canadian but made in USA so at least from North America!