The second two pictures are nice, but I don't really like the first one for some reason. It feels almost grainy.
The textures are no doubt better than the original game (it has been forever since I played a bit of it), but the lighting feels almost arbitrary to me in spots in the pictures. Like, some lights make sense to me, and some I feel could have been left out, or some things could have been darker.
Overall, cool work, and thanks for sharing! I wonder if people do this for practice often. I think I saw someone had modeled one of the Deus Ex HR rooms in UDK for practice a while back.