JA - regarding PowerPlanes, there’s a short and a longer answer. The short is that the PowerPlanes were intended for home theater surround channels. The longer answer is hearsay from insiders, that wall or ceiling plane speakers never seem to generate 3-D imaging cues and their directional nature is strong. Especially in a ceiling application it is obvious that the sound source is from above, firing down. I don’t know which of the PowerDriver products came first or whether they were all introduced simultaneously, but I have heard that the PowerPoint with its 45° launch plane is considered the performance winner. The unique launch allows 3D characteristics. For the PowerPlanes, I suggest front wall mounting as the best chance for a good stereo image. That recommendation is based on knowledge that we find directional information unsettling when it comes from behind, overhead, or is ambiguous, such as front speakers firing inward from side walls. The PowerPoint floats the wave in the room with less source specificity.