Bob, are the walls drywalled in your apt(some condos are not, I understand). The Qs come with a T-bracket, as long as you can get a couple of screws into something solid in the wall OR use 3-4 screws into some wall plugs, you should be fine. No need for stands unless there's absolutely no way you can attach the included T-bracket to the wall. It's nice to hide the wires in the wall for the Qs, but certainly not necessary(mine aren't hidden). You could also use Axiom's flat wire as an option too.
Speaker stands aren't included with the packages, they are extra.
I think you can get a better deal on the DSP3100 if you haggle a bit, although I understand the DSP subs have been upgraded since last year when I priced them out, so maybe they've gone up.
The QS8s have a power and range advantage over the QS4s, but either one would be an excellent surround. You may not need the extra power of the QS8 over the 4, but I've always felt the 8 was the better value(on paper at least).
