So i did buy these. Got good deal from local music shop 210e. My serial number was UT3474-001.
After using HDJ 2000 allmost 2 years for DJ, these K267 just feels so much better,and look much better. The sound is just so so so awesome much clearer than HDJ. And i just tested play set with PA system and with earplugs so i can crank these headphones much louder and OH **** that bass is sick! I use Pioneer DJM900 mixer and halfway headphone volume without earplugs i would die ;D And the stage mode is just O_O. Headband doesnt hurt feels very good these are just perfect hope they last long if they break i will buy everytime new pair because these are perfect to me. Cant wait summer to go play festival with these!