Yes, thanks. I just got the Z7 to try and as much as I can appreciate some of their qualities, I can also notice the 'imperfections' I've read about. I'm just deciding whether to keep them or not - either way I'm hoping that the M2 may be more to my liking.
Based on my experience in buying consumer goods, sometimes the "new, improved version" is better than
the version it replaces.
And then, of course, many times they aren't better than the originals - in fact, they're not as good.
But the new versions do tend to be more expensive than the originals.
One instance > I remember buying the Grado RS1e upon its release. Two or three years ago.
I had the RS1i, and loved it.
But I didn't much like the RS1e.
And very soon afterwards, I found that many others felt the same way.
[You can see many threads about this issue here on head-fi.]
Fortunately, I was able to return them for a full refund.
And I did so.
Though I do intend to buy the Mk2's as soon as they're out (without premium pricing),
it's without any strong expectations one way or the other.
All I know at this point is that there's a new product out from a respected company,
and the PR machine is in full swing.