Hi friends I daily use K240M AKG headphones. They are very comfortable, sound nice but as I have been sessioning lots of semideff musicians, leakage starts to become a problem. I know they have other models, with different impedances and so. I donpt have a chance to test all models here in Brazil. Some people mention Sony, Senheiser, Koss. I use other cheap models made in Brazil, quite sealed but sound horrible and are not very comfortable. at the $100/$150 range which models would ya recommend me?