Best set-up under $20K

Have you guys A/B-ed air play? I have with tidal connect through a streamer both hardwired and Wi-Fi, air play through the same streamer (both tidal and Apple Music over air play). Also A/B-ed to an optimized Mac and honestly they are all real hard to tell apart with standard 44.1 16 bit files. Yes there are slight differences but meh use what ever is convenient. I think more of it comes down to how the individual steamer and DAC handle the interactions. 

I absolutely love having large, sensitive speakers. Check out Pure Audio Project speakers (mine are Trio15 Horn1, 96 dB), driven by a terrific 2A3 tube amp from Whammerdyne. Also a tube preamp, octal-pin based. And the crossover is easily tweaked to your preference, if you wish.

You need a biggish room for this system and you will need to buy used to get it for around $20K but it will be astonishingly good.

1) Magnepan 20.7  $9K used

2) PS Audio BHK 300 Mono Blocks $6.5K used

3) PS AUdio BHK Signature Preamp - $3K used.  For an upgrade ARC Ref 6SE around $9K used.

4) Gustard R26 DAC with OCK-2 Master Clock - around $2 K new

TEAC Ud-701n DAC,Pre,Streamer

ATC SCM50 ASL (active)

Puritan 156

Focus Fidelity Room Correction software