I think you should try the best Class D until today.
Purifi 1et400a much cheaper and could satisfy you and you can invest
https://www.apollonaudio.com/purifi-1et400a-apollon-audio-monoblock/
Or
Linnenberg liszt monoblock
Purifi 1et400a much cheaper and could satisfy you and you can invest
https://www.apollonaudio.com/purifi-1et400a-apollon-audio-monoblock/
Or
Linnenberg liszt monoblock