Based on the recent review in Stereophile, I wouldn't touch a D'Agostino at that price point (or maybe any price point TBH). It took 2 samples before they found one that wasn't broken in some way and, as usual for Stereophile, the clueless reviewer gave a rave review to the broken sample. The whole thing was shady/inept on both sides.
Our opinions though really don't matter. If you're going to be able to live audition them with the speakers of choice, go with whatever you like...not what some guy on an Audiogon forum says or Stereophile reviewer.
Nevertheless, if you do want other opinions, I can say I've heard all these amps and go to almost all of the shows (recent CES was terrible btw). Based on my personal experience, I would bet money on most people preferring tube amps (VTL, VAC, BAT or Audio Research) amps with Wilson speakers. As for SS, I can only speak for hearing Soulution, Spectral, and Halcro amps being something that stood out to me with Wilson speakers.
I've really wanted to like Gryphon stuff, but it hasn't been as great as I anticipated - both recently and many years ago. To be fair, my exposure has been limited, and they went many years without a US distributor. Now that they have a distributor in the US, and I got to hear them at the last RMAF, I suspect they will be at more shows going forward where people will have more opportunities to fairly audition what they are doing.
Please note...I'm not saying everything else is bad or my conclusions are absolute...I'm just sharing which combinations stood out to me consistently. Without direct/extended analysis everything people say (including me) one way or the other is still based on fairly primitive experience. Thus, go with your first hand impressions from the upcoming auditions. Good luck!
