Any recommendations for particular CD recorder units? I'm looking for
a "pro" model that can record on standard CD rather than the
"consumer" models that only record on RIAA taxed CDs.

Since I already have another CD player, the recorder is only for
recording not for playback. It needs only a single tray. But it needs
to have a high quality A/D converter since some of my recording will
be from LP.

I would assume that all well engineered recorders using off the shelf
op amps for A/D converters are pretty much all the same in terms of
sound quality. Is there any reason for this NOT to be the case?

The Marantz CDR-631 came up in a quick search, looks pretty decent to
me. Any comments or other suggestions?

Do rack mountable chassis also have feet on them, so they can put on a
shelf like any normal component? Or MUST they be in a rack?

Thanks,