I would use 1 or 2 M2s or M3s. Besides better horizontal dispersion as mentioned by Jay two of either of those speakers are still less expensive than one VP150. Although I think you could easily get away with using just one M2 or M3 getting a pair wouldn’t hurt and would also give you the option of using them as a pair in another location should you ever change your room and want to upgrade to a pair of QS8s.

3M80 2M22 6QS8 2M2 1EP500 Sony BDP-S590 Panny-7000 Onkyo-3007 Carada-134 Xbox Buttkicker AS-EQ1