I'm in the same boat with many other members, having reached that stage in life where my hearing is not as good as it once was. Whether it's hearing aids or in ear monitors, one common thread always crops up. People either love the sound or they hate it.
I have used IEM's for many years, and from this experience the most important take away is that proper fit of the soft ear cup in the ear canal is an absolute must for the best sound possible. It's not just how well it fills the canal opening, but also the depth it reaches within the canal. Even a slightly loose or slightly too shallow fit will dramatically change the sound characteristics of an otherwise stellar pair of IEM's. That's why good manufacturers ship their products with such a wide array of ear cups. Also be aware that all earcups are not created equal. The material they are made of has a lot to do with obtaining that all important fit. Good manufacturers usually offer optional ear cups in different materials for this reason.
This is not something that many people new to IEM's understand, so keep that in mind as you read the reviews of the IEM's or hearing aids you are considering.
+1signaforce. Musicians tend to be even more demanding than audiophiles when it comes to sound reproduction! I will probably try the ASI 3DME's myself.