If you liked the 840C, you would probably have liked the new AZUR 752BD (I own both) over the Oppo machine.
Widescreen Review issue 175 where both the Oppo BDP-105 and Cambridge Audio Azur 752 BD were compared by Doug Blackburn:
'' The 752BD has the best analog sound quality I've heard from a Blu-ray Disc player so far... there, I said it. The high-end Blu-ray Disc player getting the most attention these days is OPPO's recently introduced BDP-105. But the 752BD sounds better. The main difference is that the BDP-105's sound is more forward and has less depth. The BDP-105's stereo sound appears to emanate from a plane slightly forward of the loudspeakers. The 752BD places the main plain of the sound just behind the loudspeakers, and there's a greater sense of depth going back behind the loudspeakers and more sense of width to the sides. The other difference I heard was that the 752BD's sound puts just a bit more silence between the notes. This is a difficult thing to describe in words, but it essentially makes each note more distinct without really sounding particularly different from other high-end disc player''