"The more you spend, the closer you get to musical truth."
Fortunately, most of us here knows it doesn't work that way. I've heard a couple of systems that cost roughly $400k, to $600k, that didn't sound as good as some way under a $100k systems can. Actually, I was relieved to get home and hear my own system for a fraction of the cost of those. The one was put together by someone with over forty years of experience. That's about this mans age. It takes a lot of years to really learn this hobby.
Going by price is one way of putting together a system, possibly at someones else's expense. But years of experience of trial and error, and a good ear can get you a lot more for your dollar. Sadly, if you don't have that experience, you may end up with what someone else thinks is a good sounding system.
You could buy some amps shown here, and some speakers shown here, and spend a lot more than $500k, and into the millions of dollars with a system. I've heard some of those companies products myself. I imagine you'll find a lot of those aren't necessarily going to be the best sounding.