3CCD hands down. I have shot 4 B&W Videos, 2 of them with a one chip and 2 with 3ccd. The 1ccd camera had a good 1/3 inch chip, and the 3ccd had 3x1/4 inch ccds. The quality was hugely different between 1ccd and 3ccd. I had so many more grays with the 3ccd, the whole grayscale was so much easier to work with and had so much less de-interlaceding artifacts with the 3ccd material. The 1ccd also clipped the whites majorly, this caused both of the 1ccd films to be higher contrast, an effect which I was flaunted in the film, but didn't really want. If you have the choice I recomend the 3CCD. More options.
Thought I might put my show reel up here. I updated it monthly: http://www.janssenherr.com/showreel.html If anyone needs a DP in southern Sweden, give me a shout. Cheers, Janssen Herr www.preamp.se www.janssenherr.com