Summary: I consider myself a bit of an audiophile and really appreciate a good sounding system or component (in this case headphones). I wanted them for my various .MP3 players (I tried them out on the new Creative ZEN, Apple iPOD, my Nokia XpressMusic 5310, laptop, and other devices). Frankly I was disappointed. While the sensitivity and clarity was high, the sound-stage was muddled and uneven and the bass very weak. I did not enjoy the music through these headphones.
Summary: E3c were my first serious headphones, and whilst I loved them at the time, I would not recommend them to anyone now.
The best thing about them is the isolation, it's fantastic, and the best I've experienced (not tried ety's). However, the cables crapped out on my after a year of use, and an upgrade illustrated to me how incredibly limited these phones are to mids. It leaves you with a "muffled" feeling.