Image S4i
According to Chris Martens at Playback, the S4i's real draw is that it "reproduces much finer and subtler levels of information" than most of its like-priced competitors.
"Relative to other in-ear headphones near its price ... the S4i delivers a noticeably more articulate and revealing sound that is particularly engaging on delicate instruments or vocals."
"Klipsch’s patent-pending oval eartips remain the most comfortable that Playback has ever tried."
" .. the S4i’s 3-button remote/microphone module works exactly as advertised, making this a good choice for iPhone/iPod owners."
"During test phone calls, call recipients reported that I sounded much more like myself with the S4i in use than when using my iPhone’s normal mic or other headsets I had tested in the past."
"Overall, though, the S4i is a great musical communicator and a good value."
Read the full review.