I upgraded from a pair of original Alexia's to Alexia 2's last year. No regrets and No complaints. I haven't heard a speaker I prefer to the Wilson Alexia 2.
This post is more about powering the Alexia 2. I've tried about a dozen top-notch amps with these speakers.
Bronze medal. D'Agostino S-250. These solid state amps don't sound like solid state. They are very natural. I preferred the D'Agostino amp with a slightly warmer, richer preamp, like an Audio Research Ref 6 SE, or my VTL 7.5 III with RCA blackplates. And the bass is stunning! So Good!
Silver Medal. Lamm M 1.2 Reference. With Amperex Holland 6922's. Wholeness. Top to Bottom. Not the very highest in resolution. But So Musical. So good, that I kept a pair despite I found a superior amp. Will always hook them up with a party over. Rock the House. Still hooked up for hangover remedy after the party? No problem. Just play some Jazz.
Gold Medal. VTL S-400 II. I would have never kept them with stock tubes. The Lamms are better. But, find some NOS Mullards for voltage gain, some NOS RCA 12BH7 Blackplate drivers, and some new production Tung-Sol 6550s, and Magic. True Magic. So Life Like. So harmonically rich, but no exaggeration. After 40 years in high-end audio, I am truly satisfied.