Thanks to all who have contributed to this discussion. No one seems to have any direct experience with the Artistic Fidelity GISO GB Isolator, but I did find a dealer in Germany who is willing to refund my $$ if I'm not completely satisfied with it, providing I pay with PayPal and pay return postage. I may do this. Although audioengnr's solution would probably sound best, I'm not looking to spend over $2k to find out.
However, in researching I did find that Transparent Audio makes a two port $155 Plug-In Protector that accepts the ethernet cable from your wall, plugs into your power conditioner and then provides for a shorter ethernet cable to reattach to your streamer (In my case the Aurender A10.) My local dealer demoed this contraption that they affectionately call the Transparent Widget. Of course the 1 meter piece of ethernet cable happened to be Transparent's $275 cable so total cost would be $430. They streamed Tidal and Qobuz (16/44.1) for the demo and both I and another customer did hear a significant improvement in SQ. The dealer said it had something to do with "draining" the noise. FYI in case any of you have local Transparent dealers and want to listen for yourselves.
Regarding Tidal, it was interesting to learn that there is a difference in apps between Desktop and Android. I would still like to know what the "Exclusive Mode" brings to the table and if non MQA DACS are in any way affected by the MQA Passthrough.
