@hilde45 : definitely try room treatments. My room is fully treated with GIK absorption and diffusion (including ceiling).
As for the dedicated power lines, I think to me they are a bit overrated. At least for me, and the power situation in my house. I did it twice, both times professionally. The second time I went all in with in-wall Audience Hidden Treasure cabling, cryo-treated dedicated distributor panel and separate grounding. I could barely hear any difference before and after. I do use a good power conditioner, the Shunyata Everest (along with Omega XC power cord).
Pangea power cords are adequate, but I don’t think they improve upon basic, sufficient gauge stock power cords. True story, I tried Pangea years ago on my headphones amp, and it made zero difference. That prevented me to try any power cords for about three years. Until I did.
If you are open minded, I recommend you try these two reasonably priced power cords, the first for high power amp, the second for source:
A good alternative, affordable, is anything from Pete G. at Triode Wire Labs:https://triodewirelabs.com/product-category/power-cords/