Got my e3c's yesterday. Like 'em, I think. Out of my iPod, I find that snare drums sound kind of off. Need to test that a little more. MP3s at VBR96-256 sound pretty good - can't obviously *hear* that they're mp3s.
I get the faint hiss from the iPod as well. However, my powerbook is completely silent. Gotta love sitting at work in an open room and not hear the typing, monitor buzz, or any of the arguing going on around me.
Page, are you using the triple-flange sleeves with the Ety's? How do they compare to the others?