Who is the best power amplifier that matches better with Zellaton plural evo

I have a Classic and use it to drive my ProAc D-40r speakers.

Get another Classic and use them as mono blocks.

I have a friend who does that with Wilson Benesch Resolution speakers.

He also has the Classic Preamp. Great sound.

Convergent Audio Technology (CAT) have superb sound and can drive anything.  They have no problem with MBL or Magico.  

If you are spending Nagra money the KRELL KSA i400 would be what I would look at. I have owned 2 of the lower end models and they sounded great. Super smooth and buttery sound with good detail. Class A using the KRELL iBias system. It also runs cool.

Th KSA i400 is much better than what I owned (K-300i and Duo 175XD) and can drive any speaker.

Krell Illusion II/KSA-i400 Pre/Power Amplifiers | Hi-Fi News (hifinews.com)

This review is not that great.

Krell KSA-i400 40th-Anniversary Reference Stereo Power Amplifier | Hi-Fi Heaven (hifiheaven.net)

I would use a Benchmark LA4 preamp with the KSA i400 if I ever got it.

BTW - I should state that I have not heard the KSA i400 yet. I am afraid to hear it :)