Firstly how "great" is the sounds. Take CHopin as an example. When listening to it,,do you hear ALL the keys at once or is the bass not herd much OOORR is the base to LOUD OORRR can you hear the base when You NEED to hear it and the other sounds cristal clear as appropriate?
Finally--does (from your experience) the battery life fall from 5 hours to say 3 hours after using the earohones for more than 3 months???