I have a PS5 with PS Plus Premium and a gaming PC with Game Pass. Both played on my TV like consoles.

I have no need for any type of Xbox. I recommend you just get game pass PC. It's $60 cheaper than the Xbox Game Pass anyway.

But, if you want to try something new or have issues with your PC, the Series S is cheap enough to tide you over for a couple of years as long as you don't buy the memory expansion or too many digital games (specifically ones that would be significantly cheaper used).

If you just want a cheap Game Pass machine, you can find a used Xbox One for under $100 easy. The only games you'd miss out on would be Flight Simulator, Scorn (a walking simulator) and Gotham Knitghts (which you could get on PS5). Every other game can be played on an Xbox One, albeit at lower quality.

As I think this through for you, there's no shortage of Series X or S. You can try out the Game Pass on your current PC for like $1 I think. If you don't like it, you can cancel. There are no release dates for games like Starfield or Elder Scrolls 6 that will (presumably) be your 1st true current gen Xbox games. If you like the Game Pass on your current PC, you can wait until these games (or any other games you are interested in) have firm release dates. By then, you might be closer to getting your gaming rig or even picking up a cheaper Series X/S. The prices of these consoles will either stay the same or go down.