World Wide Stereo offers the Klipsch Reference S4 Premium In-Ear Noise-Isolating Headphones, model no. 1013730, for $99.99. Coupon code "G0REF" cuts it to $46. With free shipping, that's $3 below our mention from five days ago and the lowest total price we've seen. (It's also a current low by $23.) Features include four different-sized ear tips, storage case, clothing clip, 10Hz to 19kHz frequency response, and more.