Sonus Faber Guarneri Memento's

Perhaps you can consider the Accustic Arts Power 1 integrated.
I use it with SF Cremona Auditors and they make beautiful music.
Look up Positive Feeback and Soundstage. I believe they both have reviews on this amp.

Take a look at Pathos. I am using their classic ones in bridged mode with the concerto domus. They work very well. I imagine they would work well with any sonus faber speaker.

I know this is an older thread, a few months old but I have tried SEVERAL amps with my new Mementos. I ended up with a combo that blows me away everytime I power it up.

Cary AES Six Pacs with upgraded caps
Cary AES DJH signature preamp
Cambridge Audio 840C CDP (beat out my big $$$ Cary 306/200 for $1300)

Tried some solid state (Not good), tried Cary rocket 88R F1 (not enough power), tried a shanling amp but was too polite, tried McIntosh but was too smooth and lacked the detail, and i also tried a few more ranging from 41500 to $6k.

Best I found was the $2700 upgraded six pacs. I bought new. Bought the DJH and am extremely happy. $5k for my pre, amp and CDP and what I get from my Mementos is a huge soundstage, plenty of power (more than I need) and lush amazing mids with as much detail as I can ask for. This is the most musical sounding system I have ever heard, anywhere and sounds better than a $60k setup at one of my dealers shops.

Dont judge quality on price. Cary/AES make some AMAZING amps and pre's. One day I will upgrade to a SLP98 and I used to own one and man, that was heaven!