Integrated amp suggestions.

3952rsalmax
My speakers are Sonus Faber Nova 5

Great speaker, have been said to be a hard load a bit like the Amati's which can dive down to nearly 2ohm in the low bass.
For those you want the very best integrated, and to me that will be the Gryphon Diablo 300, it will get the very best out of them. Or the Diablo 120 if you can afford the 300.
https://gryphon-audio.dk/shop/integrated-amplifiers/gryphon-diablo-300-integrated-amplifier/

Cheers George

I Would listen to Audionet Humboldt

Vitus are a Danish high-end company who make three fabulous integrated amps. I have demoed all three and own two of them and all sound wonderful. Their latest, the SIA-030, has received numerous awards in Asia and Europe recently. Class A to 30W and AB to 200W, it is an extraordinary amp. The Vitus ’sound’ is  neutral although with a  slightly warm, analogue sound. Not the velvety smoothness of a Luxman, and more precise than a McIntosh, but not the dry Hi-Fi sound of a D’Agostino. Think a more valve sound In the mids and top end but with rigid tight and deep bass.
I demoed Sonas Faber speakers with the Vitus SIA-025 and the combination was wonderful, especially with Classical music where the instruments were precisely located in 3 dimensional space and the sound was almost ’live’.

@erik_squires

How do the Luxman and Ayre house sounds differ from each other? I am interested in both brands but have not had the opportunity to listen to either. How does a brand like Simaudio compare to both?

Ayre has a certain darkness, like it pulls noise out of the room.  It's kind of a funny effect.  Very smooth, touch warm in the sense of Parasound.

Luxman is closer to D'Agostino.  Extended on both ends, liquid midrange.

Have never heard Simaudio so I can't help you. 

The Luxman/D'Agostino/Ayre triad represent amps I'd be happy with for the rest of my life.