Found a nice image: comparison of some popular IEMs. Enjoy.

Left to right: UE11; Etymotic ER-4P; Etymotic ER-6i; Q-Jays; Shure SE310; Shure SE420; Shure SE530.

Left to right: UE11; Etymotic ER-4P; Etymotic ER-6i; Q-Jays; Shure SE310; Shure SE420; Shure SE530.








)
) is that Im afraid I wont be able to sleep on the side of my head with them on... any insight would be helpful.


