I would seriously recommend the Luxman C900u. I also think the ML 523 is outstanding. I doubt that spending more will yield meaningfully better sonics. I’ll get beat up but I can’t imagine that you’ll think Mcintosh is in the same league. In addition I’ve seen that mac owners are not happy w service. same for arc for what that’s worth.
The build, sound and ergonomics of these two units leaves nothing to be desired and both list for 15k. IMO