System advice

The heart of your system could be as few as 2 or 3 major components.

* integrated streamer/DAC/preamp. Consider offerings from Lumin, Matrix Audio, T+A, NAD, For the OP’s situation, I might lean toward the Lumin P1.

* Kef LS60 active speakers

OR

Kef LS50 Meta speakers + Benchmark AHB2 power Amp + Rythmic F12G sub

The Lumin P1 new ($10K) and KEF LS60 new (~$7K) would break your budget. May be hard to find used. The Matrix Element X2 or X2 Pure offer feature sets similar to the Lumin P1, but for thousands less. Actually, I might prefer the X2 Pure new to the P1 used, especially considering warranty/return rights if you are unable to audition in a shop before buying.

I'm giving the OP kudos for simply using the word 'advice' correctly instead of 'advise'!

@thecarpathian +1.  Now let’s see if he spells “base” correctly, and curious what manufacture he goes with.  Ugh.

I know audio connection in Verona nj has a Belles Aria Signature Demo discounted. They are great sounding amps. Comparing to other amps, well I guess it’s up to individual taste.

Room dimensions?  Room acoustic properties?  Any issues with speaker placement?  Etc.