Adorama offers the Sennheiser HD600 Audiophile Stereo Headphones, model no. 4465, for $249 with free shipping. That's the lowest total price we could find by $71, although we saw them for $20 less in May. They feature a Kevlar-reinforced 10-foot detachable cable, 300-ohm impedance, and 12Hz to 39kHz frequency response.