sorry to double post but just wanted to add @puma_cat that i perhaps got muddled about qr-bb from your wonderful review of the sigma v2. i quote relevant text below. in hindsight you were clearly indicating how good the sigma v2 was by favourably comparing it to devices which use the qr-bb tech. what's interesting now is if the v2 breakthru is so good they leave off the qr-bb in future iterations. the amount of development is fantastic.
"The new Sigma NR v2 PC brings the type and nature of presentation that I've only experienced from Shunyata devices that have the QR/BB technology. If you've never experienced what a Triton V3, Typhon QR, Denali, etc. brings to the equation, all I can say is that the classic audiophile terminology we've used for the last 40 years simply does not apply any more. Put quite simply, you have to experience it to "get it". "