I use an old Marantz 630 (bought before CD duplication became v easy.
It has fantastic ADC's on board (DS 64 X Oversampling (2.83 MHz), 1BIT), a great error correction circuit and solid clocking, plus down sampling for 48kHz signals, optical, coaxial, XLR and RCA inputs.
There is a huge amount of stuff that can change how a CD sounds when recorded.
D
