I have a PC with an RTX 3080 and an I9 processor with Xbox GamePass hooked up to an LG CX Oled. I also have a PS5 with PS Plus Premium hooked up to the same TV. Play both from the couch. Most of my playtime is on the PS5. I actually think PS Plus is better than GamePass for now. It's a lot cheaper (than the Xbox version, same price as GamePass PC) and has about 300 more games. GamePass gets you day one games but the library is mediocre compared to all of the Sony exclusives.

I have an Xbox 360 and an Xbox One collecting dust. Unless Xbox starts releasing exclusive games that aren't also available on PC, I see no reason for a Series X.