I can't comment on the Vision, or the Insight since I have neither, but the experience I have with AVA DAC, SS or Hybrid, have always been great.
I have an Ultra DAC and a SS DAC built in 2002, not the Omegastar, since it says "parallel processing something..." on the label, and I like them both. They both have different characteristics, I switch them in and out of my system every month or so, and they sound great.