Magico A3 vs. Wilson SabrinaX

I honestly think it must’ve been the setup... SabrinaX are quite dynamic... not as much so as the Sasha or older W/P’s, but not lacking in slam.

The XA25 should be able to drive it to reasonable level.

Whatever sounds best to your ears should guide your decision. With that said, I do not believe the XA25 is enough amp to sufficiently drive either. If that is the amp you demo'd with the SabrinaX, then that might explain some of your impressions. YMMV

It was a a big Boulder class A power amp - Juice was there for sure! I @ironlung, I hear what you;re saying - I just can't find a place to listen to the Magico in the DC area...There are some encouraging prices for the SabrinaX (and Sabrina), and perhaps I shold try to  listen to them again. I'll try also the Totem Tribe 2 as well this coming week, and perhaps the Klipsch Forte 4 (or Cwl).This is a vast spectrum, and I forgot how difficult it is to get used to "other" speakers that the ones you've had for too long...

The Sabrina are the hardest wilson to drive. It would be worth checking out the impedance curve on stereophile. 
The Sabrina is pretty dynamic for a small speaker but they are a small speaker. They have a bit of a bass spike to my ears which I think makes them seem larger than they are. Sounds like you might want a bigger speaker. 
I have also heard the Cornwall iv and fortes  and they have a very different sound from wilson but you should give them a try. Good in a different way and much cheaper. 
I have not heard the Magico but I bet they are much more buttoned down than the wilsons based on the small sealed cabinet. 
I would add in the revel 328be in the same price range (or 228be at much less money). They are easier to drive and seemed to play with limitless volume. The tweeter is perfect, the mids are open and three 8” woofers push out the bass. 

Having heard both speakers, IMO the Wilsons are far more musical sounding than the Magico's. The new Sabrina X's are a major upgrade over the old Sabrina's...you sure you heard the new version and not the old version, which does sound more like what you describe.