I want a recording of Spem in Alium done with a mic per singer, placed spatially using Dolby Atmos and arranged as they might have been in the octagonal banqueting hall of Nonsuch Palace: surrounding the audience (in the round) and with four of the eight choirs up on balconies.

(Say what you want about "spatial audio" on earphones - if you're lucky enough to have a good home cinema separates system it's awesome, and this would be the ultimate application for it IMO.)