The M6 earphones have been around for a few years and are ostensibly more of a sports headphone. MEElectronics also makes the newer Sport Fi S6 earphones, which come in a red/black finish and include a sports armband for your iPhone or iPod Touch.
CNET contributor and audio guru Steve Guttenberg said the $21.59 Monoprice 8323 Premium Hi-Fi DJ Style Over-the-Ear Pro Headphones are the best full-size, over-the-ear headphones you can buy on the cheap.
According to Guttenberg, the headphones' bass-midrange-treble balance is nice and smooth, which makes it suitable for those with audiophile tastes. He added, "The design is closed-back, and while most really inexpensive closed-back headphones can sound canned or hollow, these suffer no such problems."
You can read his full assessment of the headphones here.
Note: Monoprice sells other inexpensive headphones that we haven't reviewed yet. But based on our looks at these headphones and some of their speakers, most tend to be very good values in terms of performance for the price. While they tend to be fairly well built, their designs are usually pretty plain (that's a polite way of saying generic).
Named for mithril, the fictional element found in J.R.R. Tolkien's Middle-earth (it's stronger than steel but "much lighter in weight"), the Moshi Mythro is an attractively designed lightweight earphone that features excellent sound for the money, as well as an integrated microphone. It's a relative bargain at its price point of $30.
If you're looking for a replacement for your Apple earbuds, Panasonic's ErgoFit RP-HJE120 in-ear headphones, which come in multiple colors and retail for less than $10, are a better-sounding and more comfortable option.
The Philips O'Neill The Stretch headphones may not have great sound, but they're well designed, very comfortable, and cost less than $50. They also come in white, and there's a step-up model, the Stretch Headband Headset SHO9567BK/28 (or SHO9567WT/28), that features an inline microphone for $10 more.