A buddy of mine is a "stereo maven", so I asked him about some new speakers when I wanted to upgrade. He gave me sound advice. Ha. Monitor Audios. They work for me.
I forget all of what he has at home but he told me he spent over $2000 on speaker cables. And when he added some more speakers, he spent more than that again he said. I used to run lamp cord electrical back in the day, I've modernized since then with some decent connections but not crazy cables.
I'm still "amused" how much an upgrade sound system in a CAR can be in new cars. You can easily see an extra $1500 on the sticker for some kind of upgrade, in a car, which makes noise.