About the older CI DAC, I was well impressed with it for such a simple unit. It had reasonably good bass - not boomy, but not really in charge. It had surprising detail and presence, but it was a little bodiless through the midsection, and in comparison to DACs in the next price step, in the end a degree less detailed and spacious. The Bel Canto was palpably more lush, smooth and deep, and at the same time more in control of the bass, and more crystalline on the highs without brightness. The CI was extremely pleasing and capable - only by comparison to a costlier DAC of similarly exceptional value did it please less. Compared to the older DACs in this list, the CI was just way better.
Build quality of the CI is an example to others at the price. The Bel Canto is in the next rung of overall quality with better chassis + connectors (the RCAs on the Bel Canto being considerably more robust with thicker plating etc.) I liked the CI enough that I'd buy one again at the $225-250 or so used, but at a couple hundred more, I think the Bel Canto stands as the greater value. If I had $225-250, I'd buy the CI. If I had $500-550, I'd buy the Bel Canto. Both are great - I really liked the CI, I loved the Bel Canto. I 'd enjoy owning either (I've owned 2 of each over the years, I currently have one Bel Canto 1.1)