+1. What he said.
That KEF Q series is on sale prices right now in both Canada and US, I just don't know if those prices you posted take that into consideration. And yes, look to SVS, Rythmik, Hsu Research and others for subwoofer(s). That Q400b is OK, but you can do a little better for similar money or a touch more.
BTW, just get the Q500 instead of Q700. They are really pretty good and the difference between the two is made up easily by putting that money into the sub.