Ok - the D5 is the black (commercial screen) whereas the 5B is the silver (general market) screen. Not many differences between the two but the black one is cheaper by about £300, and has slighty more?! features such as a screensaver.
I have the D5 and it is a superb screen! See my website for wall mount fitting instructions!
the D5 can be set to auto adjust contrast dependant on ambient conditions, bright room higher contrast, dark room lower. I have mine on auto for day to day viewing and switch to a fixed one for movies.
D5 comes with either the BNC or Phono board, not the tuner or its connector board. My BNC board was supplied separately and I fitted it myself (2 minutes tops)
I'd be inclined to think the commercial screeens were a little more rugged too, due to their intended uses, but I may be wrong
Get one, I did, it's the second best purchase I made this year (See my avatar for the number one purchase ). Remember, black is the new black, and silver will be out of fashion next week.
Me got charcoal (black) one too - 4 series. Looks great even when switched off.
The technical justification (if anyone is interested) was supplied by Joe Fernand - the silver screen's 'bezel' round the edge is shiny, and its shinyness reduces the perceived contrast. A charcoal bezel does not detract from the screen's contrast.
I haven't explained that brilliantly.....
Also, I avoid 'silver' components because they're all different colours. Arcam silver = gunmetal grey for example! I go for BLACK.