Duong, I haven't heard the VP100, but my experience has been that I've never heard a horizontal MTM arrangement that sounded as good overall as a small vertical speaker(such as the M2)as similar as possible to the main speakers in the range above 80-90hz, which the M2 is with respect to the M22s and M60s.

Also worth trying when sitting in the sweet spot equidistant from the mains is no center speaker at all, with the mains creating a "phantom" center.

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Enjoy the music, not the equipment.