New summer home thinking about the following.

I will look at the AVM units. Thank you @verdantaudio

I would be cautious in terms of going too warm in terms of amplification with that Border Patrol DAC. If you like a warmer sound, then this is a wonderful list and the A5.2 would be brilliant. Check out the review in Gary Beard’s review in Positive Feedback. The A6.2 ME is a little less warm (all SS) not tube stage.  See Herb Reicherts's review that just broke on Stereophile.  

If you don’t like a warmer sound, I would look at the Moon which I think is a bit more neutral and a few others (Chord, Krell, Musical Fidelity) or you may find yourself wanting to swap in a different DAC.

I use a Classic One Mk3 to drive a pair of Sonus Faber Concerto and I really like the sound. But, the Concerto is a pretty easy bookshelf to drive. I tried it with my Sonus Faber Cremona and it just did not have enough current to drive them. The A1 are relatively inefficient 4 ohm speakers. Based on my experience, I would be be concerned that the Classic One just does not have the power to drive the A1.  I have no experience with the A1, so am going solely on specs. But, look into whether the Pathos has the power you need for those speakers.

If you want more power from the Pathos Classic One MKIII’s they have a switch on the bottom and you can turn them into mono block amps. Both can be controlled by one remote.

https://www.dagogo.com/pathos-classic-one-mkiii-integrated-amplifier-review/

If you want to buy two of them.