Power Amp or Mono blocks for JBL K2 S9900


Looking for recommendations from anyone familiar with the speakers. Room is fairly treated. An all digital setup using Lumin streamer. I currently use an Esoteric Preamp along with Krell FPB400cx with fairly pleasing results. Wondering what power amps or mono blocks go well with the speakers or will provide with additional power / improvements?

Thanks in Advance.
nkma
Why in the name of heaven would you want more power with those wonderful and efficient speakers? I would be more concerned with the quality of the amp and moderate power.
@roxy54  - thanks for the input. I went with the measurements on the speakers being 500W capable, hence thought it might benefit from additional power.. Still fairly new to these, so may not be the right query. Anyhow, are there any specific power amps that come to mind which go well with these?
OP, it can
I saw a pair of near new Audio Alchemy DPA monos for sale, I think on USAudiomart for a mere $1500. That should be awesome