@jji666
You comment on audio packets being streamed over TCP/IP perfectly is correct - the IP packets will arrive at their destination in correct order using checksum calculations, it's all part of the robustness of this comms technology.
Noise is not at all relevant during the IP packet sending stage (unless you are getting obvious dropouts), because as I said earlier the IP packets will be in the correct order on arrival to the receiving device.
Noise can only enter the end device (streamer) by physical contact, for example over an Ethernet lead - so maybe a good quality Ethernet lead at the very end is all you need.
If you have an excellent wireless connection - then the only issue is how well the wireless receiver in the streamer is being shielded from the rest of the electronics. If there are no dropouts over Wi-Fi then all the IP packets will be received in the correct order and therefore there is certainly no need for audiophile switches and leads for obvious reasons.
In summary - IP packets in a good network will always get to their destination in the correct order (i.e. the streamer) - so from a binary perspective connectivity will always be perfect. It's the physical connection only which could introduce noise that you may have to deal with.