Hi Michal,
First of all thank you very much for your answer and your comments.
My first upgrade of my system was initially better speakers, this improvement was the first big step that you can clearly hear.
I’ve already looked around for a successor to my Denon AVR, but the choice is simply limited because I still want to use surround sound for home cinema and music in surround sound AND 2 channel. Actually, only the Rotel RAP-1580 MK II would come into question, but I don’t really like the look of it. Then I had the NAD T778 in mind, but I read about problems with Dirac and the loud fan.
I also don’t think a Marantz really sounds that much better than my Denon.
Maybe you have a good recommendation for a more suitable AVR?
Since the RS150 also has a very good DAC installed, I would assume that you should also hear a noticeable improvement in the Denon’s direct mode (Pure Stereo), for example. On the other hand, I can’t judge how much “worse” the RS250 would sound, but of course I like the look of the RS150 even better, because of the larger dimensions…
(Please excuse my long post)