@bluethinker I discovered the same thing with USB and my Merason, and probably any good USB DAC, that cable can make a huge difference. In my case I replaced a Transparent USB with a Wireworld Platinum, huge difference, so I know what you are talking about.
The Bricasti M3 is doing well and has brought the increased level of incisiveness to the sound that I was looking to balance out the warmth of the QLN's. A few days after I bought the Bricasti, I picked up an Antipodes CX server to compare it with my Innuos Zenith MkIII. Switching from Zenith-USB-Bricasti to CX-Ethernet-Bricasti was a big step up.
I had a friend over today to listen and we compared the CX Bricasti combo using both USB and Ethernet, a very significant difference in sound. I have to go back and listen to the Zenith-USB-Bricasti again. Zenith was running Sense, CX was running Roon, so not a clean experiment, nor meant to be.
Somehow I have the feeling I will eventually take @audphile1's advice and try the Meitner 3, it sounds like it hits the sweet spot, and it supports Ethernet.