The PSA DS design is to upsample all inputs to 20x DSD rates. You are paying a lot of money for their algorithm. To upsample before the unit and then to send into a pipe that only takes DSD64 (Bridge II), well then I think you’re considering spending lots of money on the wrong DAC.
You’ve had a number of questions regarding the PSA DS unit, one was whether to use Ethernet or USB. If logistics work for you where you can use USB then save your money on the Bridge II and go USB. The heart of the DS its is FPGA design. The Bridge is just an interface that you can add on (at any time) if you need it.
I own the DS Jr, has onboard Bridge bundled in. I also own the Mytek Brooklyn which ain’t too shabby either, but compared to the DS Jr, it is no match. Also my Brooklyn now is 2 years old is already out of date with Mytek’s latest releases, where my DS Jr continues to stay fresh with each software update of its DAC algorithms.
I think you’d be happy with the PSA units, but if you’re interest are in doing your own up sampling then you’d probably do better with a different DAC that does not rely on its own up sampling algorithms.