I have the e3c's, and am extremely satisfied with them. I wear them everywhere. On the bus, at the park, downtown, near a really annoyingly loud freeway bus station, at home, and while at work. I listen to a variety of styles of music as well as Audible.com audiobooks, and am constantly impressed by the clarity; clarity that sometimes even reveals problems from when the music was recorded.
When I first got them, I found them really awkward and complicated to put on. Within a month, I was able to put them on at almost the same speed as I could put regular earbuds on. It just becomes habit. I tend to switch between the foamies and the rubber inserts depending on my mood or circumstances around me.
I have never tried the e2c's, but when I first looked them over, they seemed a bit big to me. I like how my e3c's almost are unnoticeable to me when I'm wearing them and don't really stick out much at all, maybe 15% more than regular earbuds would.
I also wear mine with the cord going over the ear, then down in front of my chest, not down my back, since that WOULD be more work to put on, and to simply keep in my ears especially when wearing a backpack. I have done this at times as well while traveling, and it was indeed handy, but I would do it on a regular basis.
Hope this helps you get an idea of what it's like to use the e3c's.
