People have been raving about using the Clari-T with single driver speakers, like the Omegas. So, potentially the SI would work well with them as well (especially if you make use of some of the modifications that are available). The Super 3Rs go for around US$750, which sneaks under your Can$1000. The regular Super 3s (without the R) go for US$550, which I guess is around Can$700. If you're worried about bass (as these only go down to 58Hz), you could probably find a decent sub for Can$300. I've heard good things about the Rava, which might not be much more than Can$300 (especially if you find it used).
I just got my SI amp in the mail, and have it hooked up to an old pair of Kef Q15 monitors. They are 6 ohm speakers with 92db sensitivity. It sounds better than it has any right to. I'm sure you could find these for not too much money. I also have Von Schweikert VR-1s at home. I really like these monitors, and they get real bass too (rated to about 40Hz). They only produce 89 or 90 db/w/m, though, so may not be sufficiently sensitive for the SI (in fact, VSA says the minimum power for these speakers is 8w - and I think the SI only produces 6w into 8 ohms). I haven't hooked them up to mine yet. BUt if you buy second hand (or find B-stock, like I did) you can certainly get the VS-1s in the US$500-$650 range.
Chad