If I had the money I’d just hire a different band, ensemble, or orchestra for whatever I was in the mood for.
If you’re limiting it to an actual system, I think I’d start with designing the room from the ground up and clean power supply systems. It might be interesting to build a symmetrical room with a system at each end for A/B comparisons of speakers. I’m going to go buy some lottery tickets and get back to you. I think part of the attraction of budget unlimited would be multiple systems with vastly different objectives.
If you’re limiting it to an actual system, I think I’d start with designing the room from the ground up and clean power supply systems. It might be interesting to build a symmetrical room with a system at each end for A/B comparisons of speakers. I’m going to go buy some lottery tickets and get back to you. I think part of the attraction of budget unlimited would be multiple systems with vastly different objectives.