Given what you've said it would be helpful to know what your current system components are and what type of improvements you're after and what aspects of sound reproduction are most important to you. This sounds like it could be more of a "system" type question rather than just a source question.
But just FYI, I had both the BC DAC3 and DAC3 VB in my system on extended demo, and although the DAC3 was very good on its own the VBS was so superior it was no contest. It was so good I'd happily add it to my system today, but I'd probably still try to audition something like a Metrum Hex or Pavane as well just to see if the newer R2R DACs sound any better. Anyway...
But just FYI, I had both the BC DAC3 and DAC3 VB in my system on extended demo, and although the DAC3 was very good on its own the VBS was so superior it was no contest. It was so good I'd happily add it to my system today, but I'd probably still try to audition something like a Metrum Hex or Pavane as well just to see if the newer R2R DACs sound any better. Anyway...