Karla, I agree with Diva and Jag, go with number 4. However, the image seems a bit flat to me. Can you work the curves a bit to see if you get get a bit more pop?
the first 3 are ok as far as train pics....but they have no wow factor. Now #4 really stands out of the bunch. The movement of the train is wow and you were standing pretty close to a moving train!! Impressive!