recommend an amplifier for rockport mira 1

Just purchased a rockport mira 1. The amp i listened with is a krell monoblock system which cost is far over my required budget. My budget is around $5000-$6000 max.

Any recommendations for an amp for the rockport mira 1?
room size is 6m x 4m

Finding something that will be musical and allow me for long hours listening with no fatigue. Spacious, big and dynamic sounding. No need to be neutral and flat. Just to need to enjoy the music and no need for extreme clarity and detail.

music style is versatile. I listen to most musics except orchestra and chamber music. From jazz to blues to rock to acoustics to instrumentals. I prefer instrumental music to vocals.

Usually listen at moderate to high volumes. Almost no low volume listenin (headphones at night)