Just got on to listening to them, pretty good so far and they are different from the HE400 in many ways. For one, I forgot how light some of the other headphones are after listening to the HE400 for almost two months. These are pretty light and the ear pads are more comfortable for sure than the HE400. I didn't think the HE400 ear pad are uncomfortable, but after wearing these I can see what others are saying the HE400 velour pads are stiff. I also appreciate the wire being not so stiff,fairly thinner, and also where the wire goes into the cups of the HE400 sometime sticks out and touches my shoulders. What threw me off was I didn't expect these to have auto adjust arms.
The only complaint I have so far is the headband still not perfect as I can feel them on top of my head. I'm not sure if I'm the only one, but when I touch the leather headband it doesn't seem to set flat on my head and I think it's because the headband leather is too stiff. Maybe I'm spoiled after trying out the Mad dogs headband.
joeq70,
not trying to be mean or anything, but the whole HD800 comment is kind of random.