I did notice one advantage to using the VP150 over a vertical speaker is that whenever I sat very close the “smearing” (wall-of-sound effect) of the imaging the VP150 caused seemed to help obscure it’s position more.
If you’re keen on experimenting something I never tried was running an M22, VP150 over/under arrangement. Hint, hint.
Also Charles something I noticed when switching to a vertical center was that at first from any distance it called more attention to itself I think because of the improved clarity and imaging. I was use to the sound and dispersion pattern of the VP150 so the M22 somehow sounded wrong. It did sound odd at first but as I listened and compared things I realize the M22 had higher fidelity. I’d say I just wasn’t use to things sound more “correct.“ Over time I stopped noticing it.