I auditioned the 501s with the C46 (fed by MCD205 playing B&W 802D) and it was simply stunning. The soundstage depth was like I have only heard it with tubes. I have a C46 in my future. I have not heard the C200 but there are threads in the archives where such comparisons are made. I think the outcome was that the C200 was better but a lot more $$$ and so may not be worth it.
