FWIW, I have the Marantz SA-10 (purchased new), and it has been a great disc spinner and transport when I want to output a digital signal. It has mated well with an LTA Microzotl Pre (Level 2), Luxman C900u, and my current NAD M66. Both are highly resolving pre-amps—I don’t feel that the Marantz is leaving much, if anything, on the table in terms of resolution when compared to the best. When comparing the analog and digital outputs, information is the same, just a small difference in presentation between the internal DAC and an external one.
I enjoy both SACD (mostly classical) and regular CD (all genres) on the SA-10 and have no regrets with the purchase. I expect it to be in my system for a long time.