I don't have a specific recommendation as I am not into portable audio, other than to check out Massdrop, they have a lot of drops for DAPs and a lot of reviews and comments.
You might try Headfonia also - https://www.headfonia.com/best-portable-player-dap/ and InnerFidelity - https://www.innerfidelity.com/content/innerfidelitys-wall-fame-portable-music-players
They will all have a lot of information about headphones (which I am into) and IEMs also.
You might try Headfonia also - https://www.headfonia.com/best-portable-player-dap/ and InnerFidelity - https://www.innerfidelity.com/content/innerfidelitys-wall-fame-portable-music-players
They will all have a lot of information about headphones (which I am into) and IEMs also.