Hey Johnny_B, I can answer that one from experience! We have 5 Denon Monoblocks (POA-S10) on our AS5 and stability is the one word I would apply. I guess it depends on how far back you place the stand to the wall - we've got the stands about 6 inches out from the wall and that made for easier wiring. I can see how trying to move it with equipment on it would be very difficult indeed. Wheels would be a good idea; although I don't know how they would affect stability. We know it will hold at least the 200lbs that we have on it - we should do an official test and get back to you.

As to a matching M3 stand, the SS24 is the perfect height for them and has the same materials - brushed aluminum and soft black base. It retails for $109 Canadian per pair.