Is a pre/pro considered digtal or analog ?

Noble: it's obvious that your CDP has superior dacs /and or analog output stages compared to the B&K, OR jitter is the problem. The thing that disturbes me is that many folks have moved to pre/pros and are using the onboard DACs in the processors for CD playback. In some cases this would work remarably well except for the one factor that has been ignored: jitter. It is rare to see mention of an outboard jitter filter used between CD players (or DVD players) and processors. The difference a jitter filter makes can be substantial. While some processors have very good reclocking circuitry, most don't.

Noble:
You said the sound is better using your CDP through the analog inputs of your processor. Is it good enough? There is the big question. B&K makes nice equipment for the money - usually very smooth, at the expense of some dynamics/detail/imaging. I'm listening to a B&K amp as I type this, and I'd gladly keep it rather than the Classe CA101 that I brought home for the weekend. It's just more musical.
In any event, I wouldn't dare recommend which step to take next, because I don't know your system, room, musical tastes etc. You can try a Camelot Dragon 5.1 jitter filter, but I suspect your money would be better spent on a better pre-pro. Then again, you said your CDP sounded good, so does it really need fixing? I have brought a few friends in to the nutty world of hifi, and wish I hadn't, because I've seen them suffer the same audiophile torture that most of us experience when we strive for perfection in our systems.
If you find yourself listening to music rather than equipment you might not want to change a thing!