Paul McGowan was just talking about this very issue in his video yesterday. The question asked was that with the writer's high frequency hearing diminishing, should he get speakers that boost up the top end to compensate. The takeaway was no. At 75, Paul's hearing tops out at 8-9K but from experience, he can still hear things in the music other people can't. Like your experience, Scott, while he can't hear everything he used to be able to hear, he can still appreciate and enjoy the music from a highly resolving system.
While he didn't say this, it seems to me going to a less resolving system would only diminish the experience in the frequency ranges he can hear.
Good luck with hearing aids and enjoy the music you can hear.