Well.... Abbey is only half Sibe, but acts like a typical one. Saints and Sibes couldn't be further from one another when it comes to energy levels. Abbey NEEDS to run for at least an hour a day, if we miss a day due to extreme weather we have one wound up girl. I think considering their activity level is one of the most important things when thinking about adding one to your family. They are smart, quick learners if they don't get bored. And they are happy lovable dogs, when they get their exersise. As far as shedding goes, well you already have a Saint and know all about that! I think that they are great dogs, especially if you are loooking for a something with a little more fire in the belly than a Saint. One last thing...they need their exersise, but more importantly they need a place that is safe to get it. Sibes DO WANDER, if their curiosity gets the best of them they are off. A fenced area where they can burn off their energy is a huge plus.
Good luck in your decision making!