ethernet from a power outlet


Amazon has a number of devices which allow for Ethernet connectivity thru a power outlet.  How do these compare with a plain Ethernet jack?  I want to do some hi quality streaming but I do not have a jack near my stereo system and I'm told that WiFi is not as good sonically as having a hard connection.
russellrcncom
Doug, if you're out there:

-  what USB cable are you using?
-  Have you been tempted to try and clean-up the signal to the Sonore and  between the Sonore and the DAC)?  I'm looking at the Ifi products and thought for the price might be a good investment.   
russellrcncom,  
I have been using USB cables from Audioquest following my USB cable survey for Dagogo.com. I went with the middle of the line (red colored) USB and have been pleased with it. The top of the line was somewhat better, but I had to allocate resources among many needs. 

A huge boon to the SONORE Signature Rendu has come in the form of the systemOptique upgrade. You do not want to miss this upgrade. I was stunned by the improvement of the system by conversion from Ethernet signal to optical signal. I love the improvement for the SignatureRendu and Small Green Computer combo. I strongly recommend you do that upgrade; it is highly efficacious. I had tried a couple optical connections years ago with Redbook players to DACs, and this is utterly superior. The implementation is beautiful. If you do so, pay attention to the power cords powering the systemOptique converter module as well as the Signature Rendu SE. 

Between the Sonore and the DAC I have used one of my all time favorite USB cables, the Clarity Cable Supernatural USB (1m). USB cable is critical to overall system performance, so try at least 3 different ones if possible. I have not found USB cables that split the signal/power to be necessarily superior. 
I have a Bluesound Vault 2i that requires a hard connection.  I tried a Netgear PowerLine 2000 for a while which is Ethernet over AC.   After a while i noticed a cracking , distorted sound through my speaker that actually sounded like a bad tube.   After ruling out the preamp and amp not being the culprit, I discovered that the Ethernet hard connection was the cause, even if my Vault / DAC was not the source....  even set to Tuner the system still had noise.

It was driving me crazy....then I found the Linksys AC1200 MAX , a wireless bridge with 4 LAN ports.   Works perfectly with Tidal Master playing through Vault, BluRay, wireless cable box all plugged in .   Streams netflix , plenty fast.   System is dead silent again.