I'd like to address two things.
1/ You say you like to see 96db sinad minimum so that it can handle the entire dynamic range of CD at least.
So tell me. Under what circumstances in the real world are you able to reproduce 96db dynamic range? What is your listening room noise floor? What is the peak capable or tolerable sound pressure level in your listening room?
Instead please estimate what real world dynamic range your listening environment can support.
2/ This declared need for high power levels for typical loudspeakers. Please play some music on your own system at your normal loudish listening level (ie what would be the acceptable max under normal conditions for you) put a scope across the speaker terminals, and measure the peak voltage you see.
Convert this peak to an rms voltage and calculate the equivalent power into a nominal 8 ohm load (as the amplifier spec assumes).
Tell us that power.
I can tell you my experience about it. The ambient noise level is about -92dBFs in my living room.
Despite this noise level there is clear difference between 16bit and 24bit resolution. 16bit sounds raw and lumpy at highs without DAC dithering on. Dithering hides resolution problem.
An another strange thing, when I tested my old Chord Qutest against new Matrix X-Sabre Pro, the differences were clear, audible, despite their 114 / 121 SINAD significantly under ambient noise level.
I don't know the reason, but it is what I hear.
My new order an Okto Research Stereo DAC, I would like to compare it with the Matrix when it arrives. SINAD is similar but THD (without noise) is very different, I'm curious about the difference, if it will be audible.