Pros: Bendable wire near ear, great fit, beautiful isolation, smooth bass, clean highs
Cons: cable gets twisted easily, the cable with the built in mic is poorly made
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 in love. Out of the box.
The isolation was the first thing I noticed, the world was just shut out. Such a great and comfortable fit.SQ was on par with my worn in e4's and have since got better. Nice meaty bass, creamy mids, and sharp but clear highs.Not much I can complain about in regards the sound. They are my go to whenever I leave the house, gym, or on the iPad.
Only complaint is the cable, its can get a nasty twist in it. Not a like spaghetti tangled but it almost looks twisted down to the solder. Replacing it for the mic'd version is a bad idea. The mic version does not have the awesome bendable cable that connects to the monitor.Maybe look at buying an extra cable just in case, like the cool clear model ;)
I am not an audiophile by any means, however I have been through several in ear headphones over years from crap ear pods to custom fitted 535's and for the money the 425's are the jam.