I don't know about others but I can only enjoy open backed headphones in a quiet environment. 600s and 580s don't sound so great when they're competing with a discussion in the cube next door. It was for that reason I suggested closed cans. Also having a reasonable pair of closed cans is perfect if you want to watch a DVD or listen to music at home without disturbing others, and without being disturbed. I only ever use open back cans when I'm in a quiet room, and where I'm not going to annoy anyone else with my second-hand music.
Hope you like the 280s Abe.
Hope you like the 280s Abe.