I am big fan of manniquins and this shot is very well done, I really think it could be better with different angles and Photoshop work,I think that if you are to make a shot like this it needs to be really pushed to allow your vision to really be recognized. Keep going with this, I see many possibilties that could be reached.
I think this one is bigtime fun and exactly the kind of shot I would hope to find on a site like this. Maybe take a little off the top and the right so the subjects fill up all of the real estate available. Alternatively, crop to the main three on the left so there's a progression of both size and light.