Coming from an M3 owner - depending what you're looking for, either could be a good purchase, for me, I wasn't looking for high SPLs so I kept the total woofer size to a minimum, but if you're already leaning towards the M22s, and for the relatively small price difference - you might as well.

When I get upgraditis and move up to M60s for mains, the M3s will make an awesome set of multimedia speakers or B-room speakers.

Bren R.