Since you have not had much luck with responses to this thread I will chime in. I have no experience with B&W 803d. I do own the JC 1s. Based solely on what Ive read about B&W I dont think they would be a good match with JC 1s. To my ear the JC 1s are a little bright. Im using vandersteen 3Asigs and subs. The vandys are not bright yet sometimes things still sound a little out of whack. I gravitate toward a very live sound so I do not like the rolled off flat "hi fi" sound. With B&Ws reputation for being bright I would not put them together but until you have heard the combination in your room with your associated gear you just cant tell for sure. Ive heard the Belles 350A monos paired with similar gear to mine in a different room with Vanersteen 5As. The sound was not quite lively enough for me. All other aspect were very good. Its possible the Belles would be a good choice. Lots of power and in the same price range as the JC 1s. Good luck.
