Most musical IEM

[voxshall]

Anyone have any suggestions?

 

[silverprout]

Hello
Etymotic ER4s or ER4p if you want a natural flat response.

 

[Asamel]

Flagship Custom In-Ear Monitor Round-Up: Ultimate Ears, JH Audio and Noble Audio | Confessions of a Part-Time Audiophile

 

[Part-Time Audiophile]

Depends on what you mean by "musical", I suppose.