I used the e4's for about 6 years, loved them, never had one problem until one day I was lazy, forgot to throw them back into the case and the cat got ahold of them. I emailed shure and they said they no longer produced them however that they would upgrade me to the 425 for the same cost as repairing my e4's would have been.    I was a bit skeptical since the fit and design was completely different.    My mind changed quickly.   After finding the right sleeve, and doing the weird over,behind my ear deal (shure iem users know what I mean) I was...