I would like to jump in on this flagship vs low end debate. While I agree that lower end models *may* suit ones needs, some people still desire the flagship.
IMO, what separates a flagship from lower end model is the transparency, layering, resolution and imaging. Flagships will almost always have these things better than the lower end models.
The thing about these 4 characteristics are that nearly everyone wants these to be the best in their IEM as these are more objective than subjective. That's why when you are buying a non-flagship when you had the money to buy the flagship, you essentially know that there will always exist a model that does these things better than the lower end one.
The only solution imo is look at products from other manufacturers too whose flagships lie more in line with your signature preference.
Edit: To give an example, I like musicality as my preferred signature. For my preferences, the Proto H and Athena are more along the lines of the signature I want. However, I also want the technicalities of a Zeus. If I were to buy a Athena or Proto H, I *will* never be able to forget the fact that how much better the Zeus is at technicalities(which let's be frank almost everyone wants). At this point, I start looking at other brands and look at tia fourte. This has technicality almost on the same level as Zeus and has my preferred musical signature.
Edit 2: Then I realize I am broke af to buy the tia.