Since your considering the Spatial M3, I thought the following system may interest you. It seems to have everything you wanted for just abut 4K (new).
https://www.audiogon.com/listings/planars-emerald-jolida-speakers-amp-preamp-dac-complete-system-com...
https://www.audiogon.com/listings/planars-emerald-jolida-speakers-amp-preamp-dac-complete-system-com...