Adorama offers the Sennheiser HD 650 Over-Ear Headphones in Titanium/Silver for $299 with free shipping. That's the lowest total price we could find by $101, although we saw them for $25 less in May after rebate hassles. These open-back circumaural headphones feature a 10Hz to 39.5kHz frequency response, 300-ohm impedance, Kevlar-reinforced detachable 10-foot cable, and aluminum voice coils.