I like the first one the most. The B&W actually adds to the slight abstraction on these featureless-faced mannequins.I would imagine the quartz lights inside the displays created some whacked out color with the daylight mix, so getting rid of the color information is a logical choice. I have to say, the mannequins are kind of freaky looking ones, which helps on these. The Cubist aspect of these is interesting.
I like the utterly featureless mannequin face in #1, contrasted against that single human eye in the photo background. Plus I like the sidewalk/mall-walk reflections on the skirt area. Shots 2,and 4 really don't do much for me overall. I like the multi-plane, Cubist aspect of #3, but overall, not sure the right-hand figure is helping...
A thought on #1...can you imagine what this would look like if the inside wall reflection would have been placed right on the missing eyeball space of the mannequin, and then the photo model's eyeball were about where it is now? Still, the strong diagonals from the interior wall and the line that leads to the right....kind of an interesting device that makes #1 my favorite by far of these five.