I am looking for some on or over the ear headphones for use at work. I have recently tried the Shure se215 and while they sounded decent, the would not stay in for the life of me and I really just don't care for the IEM. I work in a warehouse so I have to deal with loud horns and conveyor belts all day so something good at isolating sound would be nice. I have heard that sound cancelation causes an odd pressure on the ear, so I would be willing to hear peoples opinion of this technology. Also, although I don't have plans on dropping them or making pretzels out of the cord, something that isn't super fragile would be good. A wide variety of music would be listened to through these. Dubstep, rap, 90's rock, country, etc. I would use my audio technic a M50s but they are straight corded and something a little smaller is what I'm going for.