Just to clear out potential confusion:
the B and C model are quite different in the end (ccfl vs led, 10-bit vs 8-bit, matte vs glossy, more connections vs less, scaler vs no scaler, pivotable stand vs regular stand).
The B model has only one variant, and it has matte surface.
But the C model has two variants:
- one with glass front
- one without glass front
But the important point is that both C models are glossy. The one with glass is a little glossier, I guess, but they're both still glossy.
If there is high amount of ambient light in the room, glossy surface will result in reflections. But if the amount of light is lower, it will give a clearer picture.
Matte on the other hand, will greatly reduce reflections and thus give more uniform picture in average.
Matte is a safer bet in general, but if you can control the light sources of the room (for example shades to dim the room and an additional lamp to place behind the monitor), you can get clearer picture with glossy. Another option to reduce reflections is to increase the monitor's brightness to crazy high, to the point where you'll scream "Oh my eyes! It burns!". To which I would strongly advice against.
PS. I think there was also a debate whether or not the glass front C model makes the picture clearer when compared to the non-glass C model, but I won't touch that subject any further.
PS2. Wow, that was a long post, I initially only intended to point out that choosing between matte and glossy would result in a lot of other changes, as well.