In reply to:

I chose the 24-inch when I moved the M22s into my home theater system to raise them closer to the level of the TV screen



Thanks Alan. That's exactly what I plan to do. I want it to look decent with the TV, without harming the sound. 16" would look funny to me, but somewhere around 24" would be just about perfect I think.

They should arrive in a couple of days. Once they do I'm gonna eyeball it and decide the exact height.