InvisibleInk
Headphoneus Supremus
Did you try the ER4XR?
As mentioned in my ER4XR impressions (posted yesterday):
Unlike ER3SE vs. ER4SR - a comparison in which I could not tell them apart personally (I am sure people with golden ears WILL be able to)...
In the ER3XR vs. ER4XR - I could hear the difference, and I do feel you get rewarded for the extra cost.
Again, all my own personal experience. YMMV
No, I haven't had the pleasure of listening to the ER4XR. I'm still waiting to find the right impedance adapter for my ER3XR to try that well-known mod to make a poor-man's ER4XR facsimile.