Greg,
I had a Pioneer Elite PD-F19 (301 disc) changer that worked exceptionally well. Has both coax & optical out if I recall properly. Had one of the quietest carosel mechanics I'd seen (a whole hell of a lot quieter than any Sony I've ever seen. I'm sure the Sony's are good players, but damn are they mechanically noisy!).
I'd still own it if I ever actually used it. But as I never listen to CD's, I sold it after it'd collected dust for a couple of years.
If you're looking to daisy-chain a couple of them together, you've unfortunately gotta use the analog outs to make one deck control the other..
They did quit making that particular model about 4 years ago though. Not sure if I recall what the current Elite 301 disc CDP model # is. But you might want to give them a look see...