Some used options for integrateds currently for sale here
Ayre Ax7e - Ayre is usually a good match with SF
BAT V300x
Conrad Johnson CA200
The Ayre does not have as high a power rating, but may do fine. You might want to find a Ayre/Cremona dealer and ask for some advice. They are a pretty common combination. At 91 dB, the M is pretty efficient.
I have not heard any of these with the Cremona M, so am just making some general suggestions. The NAD may be OK, but I would also look at some of the used options.
Ayre Ax7e - Ayre is usually a good match with SF
BAT V300x
Conrad Johnson CA200
The Ayre does not have as high a power rating, but may do fine. You might want to find a Ayre/Cremona dealer and ask for some advice. They are a pretty common combination. At 91 dB, the M is pretty efficient.
I have not heard any of these with the Cremona M, so am just making some general suggestions. The NAD may be OK, but I would also look at some of the used options.