Help choosing direction

Hi everyone,
I’m a bit at a crossroads and could use some experienced perspectives before going further down a path that might not be optimal long‑term.

Current gear
Amplifier: Marantz PM6007
Streamer: WiiM Pro Plus
Current speakers: Xanadu AW‑11 (older, inherited)
Subwoofer (just ordered): Arendal 1723 1S

I was choosing between Arendal 1723 1S, SVS SB‑3000, and KEF KC62

Secondary system inherited: Full vintage Pioneer 608 system (amp, tuner, tape deck, speakers)

How I listen

Music first, but hybrid use:

Hi‑Fi listening
DJ mixing / electronic music production
Home theater (2.1 / 2.1+ rather than full surround)

Genres: almost everything, but electronic music dominates lately
Listening positions:

Couch (TV listening)
Desk is next to the TV (nearfield possible in the future)

The dilemma
I want to invest correctly, not impulsively.
I want:

High‑fidelity music playback
Trustworthy sound for mixing / DJ work
Strong low‑end & scale for movies (but this more secondary)
Future‑proof choices (no sideways upgrades)
Avoid buying things twice

But I realize these goals pull in different directions.

Speaker paths I’m considering
Neumann KH120 II
KEF LS50 Meta
KEF R3 Meta

But are they honest enough for production work?

4. Other directions

ATC SCM19?
PMC?
Anything I’m missing that truly balances:

Hi‑fi
Mixing accuracy
Home listening pleasure

Subwoofer angle
I went with the Arendal 1723 1S because:

Strong low extension
Seemed more “home‑theater capable” long‑term

But I’m still open to discussion:

Was that smarter than SB‑3000?
Overkill for music?
Best pairing philosophy with monitors vs hi‑fi speakers?

Key questions
What should be the deciding factor here:
listening enjoyment vs production accuracy vs room fill? I kind of want both.
Is a hybrid system realistic, or should I clearly separate:

monitors at the desk
hi‑fi speakers at the couch?

Given what I already own, what would you upgrade next:
speakers?
amplifier?
keep two systems?

I’m not chasing brand hype — just trying to make sane, long‑term decisions.
Any insights from people who’ve walked similar paths (studio → hi‑fi, or vice versa) would be hugely appreciated.
Thanks!