If you think cables are the limiting factor in your system you are always wrong. Maybe if you are using Dollar store wire or a really badly designed wire but every other time no. No need to see system photos to know that.
The system photos may help for upgrade suggestions. Most onus have things we can upgrade.
Some people are more susceptible to suggestion. They make good cable customers. Is a new cable going to change your frequency response? No, not unless designed wrong. Will it change the distortion? No, never. Cables are linear devices. They don't affect distortion at least for analog. If you have a digital problem get a new DAC. Can they reduce noise? Yes if the ones you have are poor. Are they poor? Do you hear electrical noise? No, then cable will not matter.