Sonic Electronix offers the Sennheiser HD 598 Over-the-Ear Audiophile Headphones with a pair of Sennheiser CX300ii Earbuds for $179.99 with free shipping. (Scroll down and click "Add Both to Cart" to get this deal.) That's $34 under the duo when purchased separately elsewhere. The HD 598 headphones feature a 12Hz to 39kHz frequency response, 10-foot cord, velour ear pads, and burl wood accents. The earbuds have a 19Hz to 21kHz frequency response. Deal ends September 7.