Best ARC tube amps for classical music?

I have thought of using an old ARC tube amp together with my Sonab OA 116 loudspeakers, and I am listening to classical music via a Thorens 126 gramophone.

I see there are many models of the old ones, and I wonder which of them be best suited for my loudspeakers and choice of music genre.

I am particularly occupied with the timbral sound of the musical instruments.

I have already been recommended a D-79, but this one is probably not so easy to get? Hopefully, there would also be some other models that woud do?

Best regards,
All of the Audio Research amplifiers are very good. It just depends on how much money you want to spend. One of the best of the older amps is the D-115 MKII and it mates perfectly with the SP-8 MKII.
The cost will perhaps not be a very limiting factor as to this, what really counts is to have a perfect match between the amplifier and the loudspeaker.

By the way, I will probably start to use other loudspeakers, the Gradient Revolution.
Do you know whether an ARC would suit to the midrange and treble section of the Gradients?
Impedance = 3 ohms in Active mode, and sensitivity around 91 dB.
Best regards,
IMHO, I think you're heading in the wrong direction with those speakers, if you want to use an ARC tube amp. Low impedance and efficiency does not make a tube amp happy.
Correction: Low impedance and efficiency does not make an Audio Research tube amp happy.
I have owned many Audio Research amplifiers with incredible results, but I have never asked a tube amplifier to drive a low impedance load, so I really couldn't say.