I have the E4's (pro edition) that I got new for $188. They have had a few problems, but I honestly have never heard anything sound so nice! Plus I love how they have a two year warranty yet the only way they can track two years from your original (supposed) purchase. The number stamped on the audio jack is the date they were made, so you really have two years from then. I sent mine in last year and got a brand new package back, with new headphones made around June of '06 which means if I have a problem before June '08 I can get another repair, or new pair because that seems to be their idea of fixing things (two other guys at work have both sent theirs in and had them replaced, one guy is on his third pair).
So, granted they may have a problem or two, overall I have been VERY satisfied.