I also fell in love with my Cardas EM5813. I listen to orchestral soundtracks, which sound so epic, grand, and spacious through the Cardas EM5813.
I've burned mine in for well over 100 hours and use the Cardas Clarifier app.
I usually listen to them thru my portable rig, consisting of an iPod Nano - CLAS - RSA SR-71b.
The ergonomics of the thick cable can be a bit cumbersome, but I found a solution that works for me. I wear a lanyard with a binder clip at the end, and I slip the cable through it, so that the Y-split housing rests on top of the binder clip. This takes most of the weight off of the earpieces.