BuyDig offers the HiFiMan HE400i Planar Magnetic Headphones in Dark Blue Chrome for $229. Coupon code "50OFF" cuts that to $179. With free shipping, that's a buck under our January mention as the lowest price we've seen. (It's the best deal now by $40.) These open-back headphones feature single-ended planar magnetic drivers, 20Hz to 35kHz frequency response, and 35-ohm impedance.