Adorama offers the Beyerdynamic DT 880 Pro Semi-Open Circumaural Studio Headphones, model no. 490970 for $175. This $25 mail-in rebate cuts it to $150. With free shipping, that's tied with our mention from April as the best price we've seen. (It's also a current low by $25, although all other merchants charge $249 or more.) They feature a frequency response of 5Hz to 35kHz, gold-plated 3.5mm jack with 1/4" adapter, and a rated impedance of 250 ohms. Rebate expires August 27.