@Rowethren, glad somebody can give at least a little perspective as compared to the Ether C Flow. If you had to chose just the Z1R or the C Flow what are your thoughts? It sounds like you found the C Flow a little lean and analytic in comparison to the Z1R.
I would chose the Z1R so far if it had to be closed but I think overall I prefer my Ether Flow (open) the most as it is such a nice expansive sound, not as much bass but it is still very defined and impactful.
There was a shipping mess up which is why I ended up with the Ether C Flows for a while and I have to say I was glad to have the open ones back. There is just something about the Ether C Flow that my ears didn't like, I think it was a combination of the mids sounding a bit recessed/flat and the treble being a bit too harsh for me. Also the Ether C Flows go a tad lower on the sub bass compared to the open but the mid bass seemed to suffer for it, whereas the Z1R dig deep in sub bass and have great mid bass as well.