I'm the guy Mojo referenced and I definitely did not like the M22 V4's as much as the V2's. There's a lot of my rambling in the thread (right below this one), but to sum it up I'll say I found them "thin." I was so surprised at this that I even set up an A/B switch and did a side-by-side comparison (but with the receiver calibration set to optimize the V4's). It may well be that the V4's are cleaner, and thus better; but I'll venture that if you really liked the V2's you won't like the V4's.
The good news is the M5's are an upgrade from both the M22V2's and M22V4's. So my reco is to take a look at those.
I have M2V4's (on a different system than the M5's), but am using them just as surrounds and haven't have the time to check out Mojo's claim. (They sound great as surrounds.)
