OP, at least in my system the use of silver speaker cables made a difference. With my second system in the study, I had a similar problem as yours, the sound was a bit dark (dull?). I swapped the cables with silver ones and things got better - at least in the areas I wanted them to be. Incidentally, I'm using the same cables in a different setup, and now I have the opposite problem ... lol!
Having said that, I don't think you should expect a night and day difference just from switching cables. IME, cables are like using spices to add a bit more flavor, but they can't turn a frozen aisle burger into a steak.
I say give it a shot (silver cables), let them settle in, and then make an informed decision. In the past I have bought based on measurements and 'sound' science alone, and have learned the hard way that just because something measures well doesn't mean it will sound good to my ears, with my equipment, and in my room.
Having said that, I don't think you should expect a night and day difference just from switching cables. IME, cables are like using spices to add a bit more flavor, but they can't turn a frozen aisle burger into a steak.
I say give it a shot (silver cables), let them settle in, and then make an informed decision. In the past I have bought based on measurements and 'sound' science alone, and have learned the hard way that just because something measures well doesn't mean it will sound good to my ears, with my equipment, and in my room.