Most DJ-advertised headphones are great for DJing - even the cheap ones. The things I look for are massive volume, reasonable clarity, and isolation. Even the cheap Numark, Stanton, and Behringer DJ-style headphones suffice, but I would rather go for some sound quality. High fidelity is not a requirement, but twisty joints are popular (my style of DJing does not depend on contorting or swiveling), and they help with isolation on a variety of head shapes and sizes. The HD-25-II is popular with DJs in Europe, but in my 'hood, the HD-280 is one of the big industry standards. I have heard that the prices of these 2 headphones are switched around in England, but I'm not sure.
I couldn't imagine using open headphone while spinning. I have some ported headphones, and sound leakage interferes with my ability to EQ properly. Which club/city are you in?
Anyways, I think the DN-HP1000 is a possible rebadging of the ATH-M50 or Pro700SV. My real question is if the drivers have been changed, upgraded, or downgraded, and if there is any other small design change. They all cost the same, and I'm curious which one has the best sound quality and which one is best for beatmixing, if there is any difference.