Hello, I just demoed the B&W 804D4s today with a McIntosh MA352 hybrid integrated with 5 band eq. I too have hearing damage call Hyperacusis from self inflicted loud volume over the years, my ears are always ringing and high frequencies are now painful. Current rig is Spendor D7s, REL B2, and Modwright KWI200, magic until my recent hearing change. Thus the Mac MA352 evaluation.
I went in the store, Qobuz with a low end streamer, The Mac MA352, and the B&W 804Ds. Discovered new magic for us hearing impaired with EQ minor adjustments (slight bass boost, minor high end trim, minor cut with the middle eq. Closed Demo room ~16x16 feet). The sound was relaxed, meaty mids, no sub required. The sound stage was recessed and a bit narrow, but the speakers were only ~ 7 feet apart. (my current rig sound stage is 3D, wide, 3rd row center seat, and insists you pay full attention at all times as a comparison that my hearing change no longer enjoys). Did not demo the B&W 804D3, but the photo shows a front port, whereas the 804D has a downward base firing port, thus suspect a different bass profile and placement consideration.
My ears did not enjoy the 804Ds in the Mac 352 flat eq position, the few minor eq tweaks made a big difference. The pre-amp tubes and speakers warming up also helped. I played harsh high frequency old rock /prog rock via Qobuz, (Yes, Aerosmith, Alice Copper, etc) for worse case Hyperacusis pain test. Very impressed, a winner for me.
That said, would suggest a demo of the Mac MA 352 with you current speakers and then the 804D4s. I demoed @ Paradyme in Sac CA. Lastly, I am not a audiophile, only a aging rocker attempting to find a solution for a similar to your hearing situation, thus the post. Cheers