You could go in so many directions depending on music tastes. And you mix one wrong item and it is money wasted. I like a mix of warm electronics with a bit snappier Speakers or vice versa. If all
your gear is warm it could start to get muddy, if all sharper it could be fatiguing. But that is for my ears.
And I wouldn't get into the old discs if you don't own any. You likely are
not missing the specifics of the nostalgia so why go into that now, learn the gear with what you know for now. Maybe
later out of curiosity. but for now put the money in what you will use.
Now I can't answer what you should do for your ears. But for mine and my style here are some components I would consider.
New or newer gear for speakers generally for me but not always. (I don't mind having a warranty).
For a warm system that is loud but clear and not deafening.
KEF R11 new, break them in or find a recently used pair.
Paradigim Prestigie are a bit sharper so I might get a warmer set of electronics like McIntosh or a nice warm tube set for those.
B&W if you like, but then I would go with 802s and the older ones. Great as a studio monitor but they are not warm. But I loved the details.
Eggleston if you can find a good pair. But bring a strong friend they are heavy, and they do like power so you want a strong amp too.
I also like Nola smaller, I hear the larger ones they have made are great so I would audition those, but I hear you will want a warmer amp.
Electronics I like my Arcam amps I like Parasound preamps and got a P3 but have not heard that mix together yet. but for a really warmer sound McIntosh I loved my older ones both amp and pre. My friend loves them with his Klispch LaScalla (spelling?). Of course you can get some good deals on Krell equipment and they are a good bet, but not sure which specifically I would go with. If you want to go old school and warm try the early Superphon preamp. But you will need to get out of the chair to change the volume this is as basic as you get.
DAC I don't know enough about the best so I would experiment with any well know brand. Might even try the Schitt since a surprising number of people have recommended it.
Just some things to try, but the key is try them. If you like your current Pass Labs then keep it and bring home the speakers you think will compliment it.
Good luck