Dear @roxy1927 : " I have been thinking to matching with the arc... ". Well that’s an alternative but for me not the " rigth " one because an amplifier must be matched, first than all , with the speakers: period.
In that sense one great alternative are the JC 1+ monoblocks that are a true challenge even against CH or any other top amplifier ( D'Angostino, Boulder, ML, SimsAudio, Gryphon, etc. ) and the JC 1+ was/is designed by a extremely well regarded electronic designer that’s is John Curl.
Take a look here and I can tell you that you can’t go wrong with and that in the future you will not need to " look " for a different amps. You can be sure that the JC 1+ can outperforms almost all the " names " posted by other gentlemans:
https://parasound.com/jc1+.php
Your call.
Regards and enjoy the MUSIC NOT DISTORTIONS,
R.