Thanks a lot for the reply, recently went to Yodobashi Camera in Japan and had some time to listen to different headphones. Actually they dont threat Numark ones but the Pioneer HDJ-500 and I really like the sound of those.

I used the K518's now for about 3 months and finally I've some trouble with the cables. The cable broke inside the wire very near to the plug on one side, so I will send them back when I'm back from Japan. I Might get refund for them, so I thought I would better invest in some new ones with...