keep away from mastering and sound frequency shaping too much with headphones... stick with a good pair of reference monitors and use the master vol now and again to check overall sound... (if you have to turn shit down during the night for various reasons)
i got a pair "open air" ( ? ) headphones that go down to 15hz ( yes i know its not audible ) and up to 22 khz ( yes i know that's not audible either!! ) and they do fine for tracking editing and general mixing around and sound shaping, they have a 6 metre cord, put a sticky note on your monitor saying " take off your headphones before leaving room " or something to remind you... easy

and yeah, they only cost me $25, not bad for 32 ohm, 100 dB sensitivity and 500mW max. power input... if you trash and bash headphones as much as i do, they make for a good pair whilst keeping your $250 specials for special occassions...
