Just bought my third and final pair. Won't be selling them again, ever. I may even get custom molds in the near future, although the triflanges aren't bad once you get used to them.
A quick question for all fellow ER4 lovers; I'm looking into getting a new DAP, either the Fiio X3 or iBasso DX50. Which pairs better with the ER4P (or S, I have the adapter)?