Wilson Alexia 2

Insanely good speaker

I heard this very pair https://www.soundstageaustralia.com/index.php/reviews/84-wilson-audio-specialties-alexia-series-2-loudspeakers 
at length over time with many different amps using the same Total Dac/Lightspeed  front end.
The only two amps out of all the ones we heard that extracted the very best from these extremely hard to drive speakers, was the Parasound Halo JC1's and the Gryphon Antillion Evo. With the Gryphon Antillion being the chosen one over the Parasound if money was no object. I dare say that the new Parasound JC1+ mono's will close the gap.

Cheers George

ARC, Luxman, D’Agostino, Gryphon, Sim Audio would all be good choices. Pass maybe. Mc wouldn’t be what I’d choose over any of the foregoing. Good luck. Great speakers. 

Any high powered receiver will do the job. Dave Wilson did a demo with a receiver to show that the speaker is what mattered.