At that price point, it will be a challenge to find a quality headphone that meets all of the requirements. The Sennheiser Momentum on ear is a great suggestion, however. The Sennheiser PX-200 folds down like a pair of glasses, and I've been using mine at work for several years. I think it may match your preferred sound, as it doesn't have as much bass as the Momentum on ear. The non-removable cables might be an issue, though.