Many, myself included, have used MCs with after market power supplies to good effect in our systems. I have a pair of TPLink Media Converters and a pair of iFi wall wart power supplies ferrying the data stream from my eero Wi-Fi Mesh base station to my EtherRegen. No night and day improvements have been noted, but its an economical way to isolate your endpoints from any upstream noise that may have been riding on the local area network connections.
Some good info. about the approach and related options in this thread:
IFi power supply products might be of interest to you:
Have fun.