Originally Posted by The Musicophile

Mixing on headphones isn't generally advised, and Mastering on headphones just isn't done (not professionally anyway). Speakers are better for various different reasons. But if you absolutely have to use headphones, look on the Sound on Sound magazine website (I can't post a link but googling it should work) and search 'mixing on headphones'. There are a couple of good articles on there which advise a certain model I can't remember the name of, and you can be sure you're getting pro advice.