I guess I'd eliminate #5 next. I like it a lot, it's different and fun but I think the windows are one of the highlights and I miss them in this shot.
Down to #2 & #4: Honestly, I can't tell any difference...maybe if I saw them side by side. I LOVE the windows in these two, they SPARKLE! The gradient background gives it depth even though it's really almost a silhouette. These are excellent, well worth the ages you spent!