I imagine you could stack all 5 satellites on a single pole, especially if you faced them in different directions. However, I sincerely do not believe you will get anywhere near the Bose PAS with volume and quality--but as you stated, the Z-5500 system is 7 times less expensive. I can tell you from first hand experience, the Z-5500 is considerably better sounding than the Z-2200 system, and it has a lot more headroom.

As for your vocals, why not purchase a small, Alesis 6 Channel mixer that has effects? You can pick one up for about $100, and those of us that have used them can vouch for the quality--they're excellent.

Good Luck,

Gary