Where would I go to purchase the accessories for the COP? 

Im looking for headphones for everyday use, and i listen to all kinds of music, I was looking at the Beyer custom one pro, the audio technica m50 and the vmoda crossfade lp's and Im wondering which one would best fit my needs? or if you have other recommendations please let me know

how would these compare to the vmoda crossfade's or the audio technica m50?

I am looking to buy a very durable, comfortable and great sounding headphone. I don't mind wether it is over the ear or on the ear. I listen to 50% rock and 50% rap/ pop. I want something that will last a while, that I can listen for a while without pain and sound good. I have $150 to spend and...