Thank you everybody for your answers. My room is 5 x 8 meters and 2, 5 meters high. I listen mostly to jazz, vocal jazz, blues and classical music. Sometimes i like to listen at quite high volume.
Today, i have System Audio Explorer Master. They dont have the dynamic capacity I want. They sound good at lower volume, but thats it. The sound caracter changes too much at higher levels.
Before that I had a pair of KEF104.2 Reference. I liked them so much i kept them for 12 years! Then they started to loss detail in the higher tones.
Well, thank you again.