System matching always matters. The B&W's are fine. They most likely do a very good job of accurately reproducing the sound produced by the receiver and your other components. In other words, they just might be too good for your sources. The Boston Accoustics while very nice speakers could be masking some of the system's shortcomings, which is fine when taking the system as a whole.
I do find it interesting that a lot of people will praise or place blame on whatever specific component they are trying out; and never consider the other components in the signal chain.
There is a consumer review of the CDM-1 at AudioReview.com, where the writer claims the bass on the CDM-1 is terrible. He was using home-made speaker stands made of wood and marble. Both of these materials resonate their own sound when they vibrate. But he blamed the bad sounds he heard on the speakers.