Yes, Steve, I did spend extensive time with the combo of the Cambridge 840C and the Focus HD speakers. They are wonderful components together. The Azur is an excellent player at the price, and the Focus HD an excellent speaker at the price - and yes, they do meld together quite, well... nicely!
Considering that personal tastes vary, I found them to be highly compatible, and would not hesitate to recommend them to be used together. Via amp and cable selections I think a vast majority of people purchasing those two would be able to assemble an immensely satisfying rig. I especially appreciate the "Digital In" feature so much that I purchased a second 840C for use at my office. Both of these proudcts are packed with value for the audiophile, and they both perform very well.
I have been experimenting with the use of Digital cables as ICs in order to add warmth to Redbook playback. I have more testing to conduct with different digital cables to determine if the added "warmth" is an artifact common to all digital cables or if it is only with the Wire World Gold Starlight that I am getting such a pleasing sound. I didn't find the Cambridge treble to be harsh or etched, but use of the Gold Starlight digital cables as ICs has improved many components' sound by adding a wonderful golden glow much like a fine tube amp. I found it was especially helpful with putting a touch of warmth in Class D amps' performance.
I would enjoy discussion of this if people have two identical digital cables and would care to comment on how they impact the sound when used as ICs.
I am fully aware of the "inappropriateness" of using digital cables as ICs, but I like experimenting and once in a while an amazingly good sound will result. In some set ups I have enjoyed the digital cables over even balanced ICs.
Anyway, I highly recommend both the Azur 840C and the Legacy Audio Focus HD as highly affordable products with excellent performance. If you are considering purchasing either I suggest you read the reviews of them so as to be familiarized with their idiosyncrasies and virtues.