If you eq your system to match your ears, every person who enters the room will hate it
I tried some very fine hearing aids, thinking of them as just one more amplification and eq component in my system. The cost $6,000. I don't use them now for music at all. They do not sound good.
A friend of mine was the engineer for the Lyric hearing aid. It is the only aid on the market which is still analogue, and was long considered the best (they are implanted, and completely invisible.) Any other aid, no matter how good your analogue system - you are listening to digital equalization. You know how much attention hearing aid engineers pay to sound quality? None! They don't even listen to them! It's like the spec wars of hifi in ages past. Their main focus now is on the software and power consumption (for longer battery life.) Their objective is to make it more possible to hear speech, by enhancing the eq and localization of sounds, suppressing sound that comes from the sides and rear which can interfere with the person speaking to you. Their whole goal is to help you distinguish sound in the 2k-4k range where consonants at the beginning of words, which is the primary way we distinguish one word from another, are heard. Only the very best aids even deal with 6K and above, and even that is incidental, because we don't use those frequencies to distinguish the sounds of words.
And btw, once those cilia in your ear are dead and gone, no amount of amplification in a hearing aid can help. If you can't hear above about 4k, you probably can't hear tweeters at all.
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My best recommendation is to design your home system so it sounds as good to you as possible. Beryllium tweeters may appeal to you.
