In case you haven't seen it, there was a review in Positive Feedback several months ago that compared the Ayre, Berkeley, and Bel Canto DAC3.5vb directly that I found pretty interesting. I had the BC DAC3vb in my system as a loaner and was highly impressed, so the 3.5vb (another one you might want to add to your list) and Weiss DAC202 are two at the top of my list. I'd be interested if anyone has compared those two directly in their own system.