I just wanted to make a post on the earphones I've come to love and use as my main "phones" (Etymotic ER4S). Below you'll find my story of how and why I love the ER4S. I'll post my eq settings shortly and more info as well. You can also check out some info on these on my youtube review channel dentReviews Without further ado...
I truly believe the er4s is the best earphone in the world so far that I've heard, and I've heard a lot from $10 to $1000 and none of them sound as good overall. Some have certain aspects that are nice. The Audeo Phonak PFE 112 is by far the most comfortable i've ever worn (and still pretty flat). The Shure 535 is almost a backwards ER4S. Great flat bass up to the mids, but rolled of treble. Although the treble roll off of the 535 is much worse than the sub bass roll off of the er4s. But still, decent bass overall for the 535. I could go on, but when I put the er4s in, eq or not, the overall sound is what I expect from overall flatness.