More than 10 hrs past nobody wanted to chip in? That's unacceptable and I guess all the head-fi'ers are busy buying/testing/selling their gears.
Interesting thread title and here is my story ....
My first wow wasn't from the EX600 (later upgraded to the EX1000 by luck for free) or the IE80 the first two pairs of quality iem's I bought. Before that I used a pair of Bose headphone long time before I knew this site and the only earphones I used were those free ones which came with the ipod 5g and my Blackberry. I did remember the Bose sounded pretty good with my ipod 5g back in those days.
My first wow came the moment when I plugged my IE80 into my Rockboxed old 5g loaded with all FLAC's. Before that I was using iphone 4s with 320kps MP3's. That sound from the rockboxed 5g with the flac's was just more musical with bigger sound stage, better 3d imaging and more details. I instantly fell in love with the rockbox and flac's and can never part with them.
My second wow came recently from listening to my ipod 5.5g modded with the Kemet film caps (paired with EX1000 and UHA-6S.mk2). I wasn't impressed initially with the caps but after the burn-in effects kicked in and the initial roughness gone, the gear sounds amazing to my ears to this moment. The sound has the best clarity, separations, cleanness, extended lows, sound stage, 3d imaging, refined treble. When it comes to sound, my top preferences are sound stage, treble and clarity. I personally can't stand any muddy or veiled sound regardless how good the bass is.
Now I am a firm believer of these caps and I may even try some high-end BIG ones which will not be fit inside the ipod 5.5g's.
P.S. I only use iem's no headphones.