Well, power cords and interconnects tend not to add something that is not there before… unless they are really cheap and allow RFI or other noise in. In general, the better they are, the better they get out of the way.
in general, you want completely compatible, great sounding components, then search for wires that get out of the way of their performance.
If they sound too warm Maybe it is the function of your components.
What are your components and venue. It would be really helpful to see your system. There is a place under your user ID to create your virtual system. This would be really helpful to allow us to help. Without knowing your system and venue… it is like shooting in the dark.