It is said that the speaker on its side config. of a center is ultimately a compromise. An extra M3 is the ideal. It also has wonderful lower end handling more so than the M22.

On that note most everyone that has gone from smaller 100 or 150 to the 160 or 180 will not go back. The amount of detail from the center you need the larger center. Especially as of more recent 5.1 etc.

Save a bit longer the 160 is very worth the extra.