I had to look, but the back of the M22 says v2! (But I'm pretty sure they told me they had already started switching in the v3 drivers. That does get me amped up to try the M22s with the v4 tweeter.

I do use a small Hsu sub.

Also, to be fair, the M5s are in my family room, maybe 20x16 and the M22s are in my study (14x13); the the low end has to be easier to hit in that smaller room. I've always wanted to swap them and do another comparison, but I'm way too lazy.