I use my Oppo only for blu-rays. CD disks are for ripping and archive. It’s easier to get to really low jitter without the CD transport. If you must use a CD transport, at least reclock it:
http://www.audiocircle.com/index.php?topic=154408.0
As you can see, the jitter is 35 times higher using only the transport. DACs are not jitter immune either. Even DACs with upsampling sound better with a low-jitter input signal.
Using the reclocker also eliminates ground-loops, upsamples the data and negates the need for CD treatments, green pens, destatic etc... Don’t waste your money on CD tweaks. Buy a reclocker instead. Much more effective and can give you 20psec of jitter, as good as a $20K+ transport.
Steve N.
Empirical Audio