Have decided that in fact cables are not the solution but that room treatment would be of great benefit. I'll have to work on that one.I agree cables should not be used as tone controls. Besides room, also check synergy between your components.
If you want to try cables, check out SoundString. It's a touch on the warm side of neutral and inexpensive. I had a full loom years ago on several different systems. They recently released a higher end model that is more neutral and extended and also more expensive.