Audiophiles fondly remember the company Audio Alchemy, which produced a number of well-received, sensibly-priced D/A converters back in the 1990s. They may have been before their time. Today, such separate converters are all over the place, but now include USB connections for the increasingly popular digital downloads, particularly of the high resolution audio variety.
Peter Madnick, who currently heads up design for the extremely pricey electronics from Constellation, has re-acquired the rights to the Audio Alchemy name. While not being shown at a booth (at least not one I've yet seen) I ran into Peter as he was prowling the show floor with a sample of his first new Audio Alchemy product, the DDP-1. It's a D/A converter with optical, coaxial, USB (asynchronous), and analog inputs. With its volume control, it can also function as a 2-channel preamp and a headphone amplifier. While its $1895 ticket is a bit pricier than the Audio Alchemy products of the past, it should be highly competitive in today's D/A market when it ships in December.