Ethernet switch worthwhile?

+1 LHY SW10-Pro.   It made a noticeable difference in my rig and I liked the difference.  It is relatively inexpensive and returnable if you don’t value the difference.

Particularly when it comes to switches, listen to your system not what people say. Too many variables.  It’s really the only way you’ll know for sure. I say this because I did what you’re doing and got just as many differing opinions as you will get here.  In my case, I’m glad I finally got a good switch.

Marco1, Thanks. Great advice. 

I added a LHY-SW8 to remove any switching power supplies from my system.  It may have had a small impact on the noise level, but nothing major to my ears.  I did not do much testing at the time.    

@lnitm are you referring to 

https://www.musicdirect.com/equipment/accessories/ifi-lan-ipurifier-pro/

if so this is similar to what @lalitk recommended and should work pretty good