Responded as a comment in your project, but I'll repeat it here for the voting! I like #5 for the competition. It's extremely well composed, and while it's a common subject, you've presented it in a very unique perspective. The lighting, color tones, and use of silhouette for the shot all turn it into something special.
i agree... #5... it is lovely and unique... it really stands out... the others are nice too, but i can easily see them getting lost amongst thousands of other entries...
Is there a link where we can view these photos large? My initial choice is either 5 or 8. Perhaps it will help us more if these are at a larger size so we can further look at the lighting, details, and so on.
Good luck!