I have a similar concern. We are all downgrading, if you will, our high end CD players for lower brand name fair that we previously avoided. I used to think that if it could play DVD's/Cd's it was the same across the board. However, I had a Yamaha CD player that was built in the late 90's, and I thought that was the pinnacle of CD play quality until I bought a Denon 3800 DVD player. A lot of difference in the separation of notes, and the clarity. I don't know if it was because of the Brown Burr chip, or what in particular, but there was a difference.
I guess what I am saying here, is that there is probably still going to be a difference in CD sound quality between a PS3 and a high end Denon, Cambridge, (insert your high end name brand here.) I am holding out for a Denon 3800BD for a nice all round player.
If you could test out the Cambridge, it might be better.