Sennheiser HD25-1 II

...and I love them. They're sitting tight, light weight (140 grams!), produce good and clear sound and all the parts are changeable so if I manage to destroy something I don't need to buy a new set of headphones. I will mainly use them for portable players and DJing. They're a bit expensive but I'm sick of buying mid range headphones that dies after a year.
So, what do you use?