I can't decide :oops:
Personally, I like the coloured 2 but that's a visual thing. For playability, I think I'd opt for the Battlemat. You could have the option for 3D terrain on the mat so that would enhance the play.
The Shadows are all wrong on the Lighted Dungeon so I'd say no on that unless we render it with something like DAZ.
What are you planning with the living dungeon? A Play by Email type thing? If I understand that, I can vote better.