Applications of the various types
Also you need to take into account what you will be using the headphones for. If you have an MP3 player then there is no point buying the Sennheiser PXC-450, simply because it will not be able to perform its best. To drive this pair, you need an amplifier, and are normally used for bigger music players. For this you might want supra aural as they are mainly used with personal media players and portable devices.
For instance, Circum-aural includes Studio monitors, for studio professionals who need absolutely clear and taut sound. For audio enthusiasts, who prefer unscathed sonic quality would also prefer a nice high end pair of this type. Gamers are the next in category who require and love using this type of headphones as the latter offer great imaging and engulf the listener. Last but not least DJs need this kind too for mixing in tracks in a noisy club, of course the thumping bass is an added advantage to all of the above.
Earphones are obviously used for iPods, Zunes and all the other portable media players out there. Due to their portability they make good sense to take around while you’re on the move.
So the first step is to find out which pair works for you. And the only way to go about it is to go out there and try each and every one of them. It’s your right as a customer!!
very useful,but could not get details on wireless headphones 
