Help me with the upgrade path

Over the last 12 months, I spent some significant (at least for me) dough on new speakers (Bowers and Wilkins CM10), amplifier (Parasound A21), and Digital Preamp + DAC (Cambridge Audio Azure 851D). I find myself listening mostly to digital content (CDs converted to digital via iTunes or Tidal --> Apple TV --> Azure DAC). I had been planning to upgrade the other components in the chain but wanted to let the $$$ shock sink in before splurging further.

So this year I’m allowing myself just one more upgrade for at least another year. Given the fact that I am using Apple TV, which is not considered the best choice for music, and non-expensive Audioquest speaker wires (I think I paid around $75 for an 8-foot pair), I wonder where I should put my money.

1. Replace Apple TV? I like the Bluesound Node 2 which sells for about $499

2. Better speaker wires? Leaning toward Clear Day Shotguns

3. Better power cords for the amplifier and DAC? No idea which ones would be a good fit for the A21

I understand that there are too many varying factors in determining the best upgrade, and too many system dependent variables, etc. -- but still some feedback would be great.