@TLS Guy: Thanks, that make perfect sense and interesting information regarding your late friend's MAC CD player. I would have thought better of McIntosh, especially with their high prices. My connections will be to an ARC SP14.
@Bobby Bass: Thanks. If I decide to go the used route again, provided I cannot find a good Sony ES unit for a decent price, I think I might consider a 1541 DAC unit from Philips or Magnavox. I found a Philips CD-50
with remote for a decent price. Still looking into these units, though - I'd like to know how the build quality compares to the Sony ES units.
I know I keep going back to the quality of the Sony ES, but I must say that I was incredibly impressed with the build quality of these units - from the smoothness of the transport to the all metal tray, to the impressive weight and the most impressive all copper chassis - the outer case on my 620 ES II was even made of copper! In my estimation, these units just ooze quality. Pioneer also has somewhat similar units, but I'm still learning about them. So far, that Philips CD-50 seems to be a good bet.