Get the coiled cable. I bought the straight cable and I can literally do jump rope with the cord. In fact, I have once.
Yeah, I have the ATH-M30s and that might as well be the sole reason why I am going to buy M50s, the 11 foot cable is a drag (No pun intended).
But these also have a really high impedance so I always have the volume on max just to hear things and they're getting a little worn out.
Also thanks for the jump rope trick, I have to try that now.