Hello Malle,
Gordon is right. I've learned that everyone hears different things. Recommendations can be valuable if they come from someone with the same sonic preferences as you, but even then, as Gordon says, they're only a guide.
I switched to Transparent MusicWave Plus cables and they made a big difference for me. I bought several pairs used and sold one pair to a friend who also uses Mcintosh amps and Summits. For him, they also made a big difference. So, that is something you might try...