Check out the Arcam FMJ CD23T. I believe this was released in the very late 90's and it was noted for its Ring DAC which had been licensed from DCS. I have one and for fun I did an A-B using it's optical out to a Geshelli Labs DAC (J2 w/AKM4493 chip). After all these years the Arcam was very close to the Geshelli J2 though the J2 was audibly a bit more precise. Lots of info if you do a search.
