When I first started reading the OP, I thought the right answer is “whatever your budget allows”. But then I read this, and was confused:
For me, I cannot see myself paying over $5K on speakers and likely not more that $3K on any other component.... even if I had the kind of money Elon Musk has.
I thought for a bit, and it hit me: it makes sense. I would not pay even a few hundreds of dollars on a designer handbag, even if I had the Elon Musk money. Because handbags are not my thing. Maybe audio is not YOUR thing?