So, WAF may dictate that the L/R and center speakers (wall mounted) be mounted laterally. The V100 is designed that way, no problem. But what about the M22's? Listening area is 12 feet from speakers. Speakers will be mounted on wall at about 9 feet high and angled down.

Will this pose a problem? What sorts of problems? Will there be big enough issues to warrant using M3ti's (mounted vertically, per their design) instead? The room is big 25 by 17 by 9 feet high (with the listening axis along the 17 foot side).

I appreciate your input, even ill-informed input (as long as it is properly labeled as such).