For people who are really serious about audio quality--generally referred to as audiophiles--something like the Klipsch Image X10i is a great fit.
The sleek earpieces are superthin and adorned with a touch of copper for a hint of style.
The Image X10i should fit even the tiniest ears without discomfort.
An integrated mic plus volume and iPod controls are contained in a module part way down the cable, along with a shirt clip that can help position the mic close to your mouth. The cable terminates in a gold-plated straight plug.
Klipsch also includes a nice, hard-sided carrying case along with a quarter-inch adapter and a dual-pronged airplane connector.
The Image X10i comes with an array of eartips in various sizes and configurations to help the wearer achieve a secure and comfortable fit.
Summed up, the Image X10i is an excellent choice for picky listeners who mainly use lossless files on an iPhone or iPod.