Bryan,
the QS8's have a woofer on the bottom, so it can't sit on a shelf or stand. If you have a stand that can somehow hold it from its back, then you're in business. But don't forget, you'll want the QS8's about 7 feet high, and to your sides - this makes it optimal for them to just be screwed onto the wall. No hassles with knocking down stands or having cables in the middle of your room.
Subwoofer? Well, yea, most people prefer HSU or SVS, but they are more expensive. I have and EP350 and love it, though I hear it's not as good as the HSU or SVS line up (but it is cheaper). My advice is: if you really can't afford more, get the EP350. If you can, get a sub from HSU or SVS. Just remember SVS has a cubic sub now. the Cylindrical subs look very ugly to me, but I hear they're not THAT bad when you see them in real life.
