Here's a review chart for in-ear monitor earphones : * [
theheadphonelist.com] *
The JH Audio JH13 Pro is rated as the best with the Noble 4s not far behind.
The RHA MA750 and MA750i offers exceptional value for the price for in-ear style headphones. The same is true for the V-Sonic VC1000 and for the Fidue A83 .
Westone and Etymotic Research as well as JH Audio , Custom Art , and Spiral Ear make custom fitted models.
Also,Sensaphonics makes custom fitted sleeves for Shure in-earphones.
If you want to stay on the VERY inexpensive side,SoundMagic has models worth consideration.