I used the DAC inside the Transporter for many, many years and was quite happy. After recently ripping all my Sacds and Bluray audio discs, I decided to try the DAC inside my Krell Digital Vanguard integrated amp. I found the Krell to sound significantly better than the Transporter. So am using the Transporter connected via coax to Krell Amp.

Now I am limited by the Transporter in terms of 96 kHz. So, thinking of switching it out for a Rpi 4 with piCorePlayer if I can get the HDMI connection to work. Currently getting music and static at higher frequencies... another topic... another thread elsewhere....

To answer your question, yes, there are some DACs that will improve sound over the Transporter. However, I was quite happy with the Transporter DAC for many years. Whether your Bryston is better is subjective and only you will know. Give it a try...