The new JVC HA-FX40 IEM for just under $20 is the first earphone using carbon nanotube technology. It has great sound quality.The Panasonic RP-HJE355 for just under $20 has very clear sound. The Panasonic RP-HJE140 for around $8 is a great improvement over the HJE120 with much greater sensitivity(107 db/mw vs 96 db/mw) and much better bass as well as less distortion.