First, ditch Amazon HD and switch to Qobuz. Read Steve Stone’s review in TAS where he compared several streaming services and AMZN HD did not fare well. They just don’t seem to be there yet, and a Qobuz trial is free so why not?
I’ll say I had a BC DAC3 in my system, but when I switched to DAC3 VB with VBS power supply it was a huge upgrade in performance and sounded very, very good. All that said, I just bought a Musician Pegasus DAC and not sure how it compares to the DAC3 VB, but at $1100 I’m betting it’s pretty competitive. If you like the BC sound you’re getting and just want more, if you upgrade to a DAC3 or higher with the VBS I think you’ll be very happy. Or explore the more recent R2R, etc. DACs if you’re up for something new. Hope this helps, and best of luck