I'm quite certain the Volts would be better for Atmos just because of dispersion. I also plan to get the HTM-12 for LCR. At first I was planning on doing the sealed Volt-10lx for surround and ceiling duty. Then I was intrigued by the Concentric-8. Both were attractive because they can be done with an IB enclosure for in wall and in ceiling use and crossed over at 80Hz. Both can also be crossed over at 80Hz with a sealed box. The edge went to the Concentric-8 because it can be had with bamboo baffle and the speaker is a bit smaller. Now I'm thinking possibly HTM-8 for surrounds and IB Concentric-8 for Atmos. The question for me is how will the HTM-8 compare to the Concentric-8 in low end output and is their voicing similar enough to mix and match them with the HTM-12?