Between those three choices, I'm going with the PS5 without a second thought.
If, however, I had to chose between XBox X & Y I'm willing to bet the Y Series is the more sensible choice. The X Series is obviously more powerful, but history says that developers will code to the lowest common denominator so that their software will run on as many platforms as possible. The point being, very few games will likely take advantage of the higher specs because publishers would not want to limit their XBox audience.
Would you develop a game that can only play on Series X? Or, would you strive to release a game that can be played on BOTH Series X & Y??? The answer is obvious...
Weather they opt for the lower end denominator still means you get greater benefits playing old games on the Series X. Much like how a good PC will run games good compared to a average PC running games averagly.
Gears 5 running at PC settings is a perfect example. Imagine if all 1st party Xbox games get next gen boosts like Halo 5 running with Ray Tracing at a constant 60/4k? That game already looks amazing on the X1X.