The 3rd looks the least comfortable? Check out the freq responce on headroom Of those three, I need to figure out if the 203's are enough, or if the 555's are worth the price over the 515's, or even the 448's of ebay for a good price. Do you need closed back? If not I have some Grado SR 225's I can send your way Well it is for my office, and I cannot really have sound projecting out. Do the Grado's leak much and are they over the ear? They are over ear, but vented to the outside, IB style I was just checking them out. Look to be really nice. Is there that much music that escapes outward? Yes, quite a bit is heard outside the 'phones Crap, was really liking the reviews on them.