recommended power tube amplifier for vivid kaya 45 speakers

Hi, nice speakers!
Your amp choices are very solid and my rating for driving those speakers would be:

1. CAT
2. Octave
3. Jadis.

I had Jadis amps and love the sound. However, IMO, the other amps will better match the Kaya 45s dynamcis and speed and FR. Another amp I heard with Vivd speakers is the MF 8000 nuvista -- lovely sound.

I would probably prefer the Jadis 200 -- but they are very expensive.
That said, you will enjoy yourself immensely with any of the amps!