e-Q7 are among most balanced IEMs I have ever heard, but this may not fit in your small ears as the nozzle measures about the size of AAA battery. I recommend trying to get the battery up your ear and see how it fits.
Another substitution to e-Q7 is Heaven A1 (FI-Ba-A1)
This perform similar to eQ7 but may fit your small ears better due to smaller dimensions.
SM3 are among top tiers and are highly regarded among among audiophiles on headfi.
One can get a used pair on FS thread for around 300 or so.
UM3x is similar to SM3 in price and performance. Read multiple reviews and comparison Threads on both SM3 and UM3X.