im looking for some headphones and it seems as if the Audio-Technica ATH-M40x or Audio-Technica ATH-M50x seem to be my best choice. as i haven't seen any bad reviews on them and they are very affordable but the only problem i have is im wanting headphones with a mic and im not sure how that would work. they don't have a built in mic so i was wondering if i could buy a cord with mic on it and use that i had a pair of beats by dre a while back and i still have the cord with the mic on it so would that work while using these headphones is basically my question.