First off I also own a pair of Sennheiser HD201 and a pair of Pioneer SE-MJ3. I recently just purchased these badboys, easily my favorite.
These headphones have great noise-cancelling
The Sound is great
Very confortable, they hug you head
Very breathable
They fold nicely in and out of the bag provided
Great looks
Great packaging
Great build quality.
However they are very big once you fold them out, they can make you look like one of the Cybermen from Doctor Who. So I used these for home uses.
I was actully in a store having a hard time picking headphone. I tried various Sony, Sennheiser, Pioneer, Phillips ect. But I tried Numark and I was shocked that I never tried these before (they are pretty new). But great headphones for £60, very surprised.