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Three very different an appealing images for various reasons. I can see your dilemma.
I like #3 the best, but am wanting to make adjustments to the color cast.
#2 confuses me with the lighting seeming unnatural as though it is coming from multiple different directions.
#1 is an interesting dichotomy of the organic water & sky vs. the formal lines of the buildings and the round sun. I'd like to see a little more separation to the ships, or them be not there at all ... preferring to have them in as part of the story.
In order to choose, I have to go with the one I like least, rather than the two I like best.
#2 seems static to me, and it also reminds me of a model shot to try and look like the real thing, given the incongruous (seemingly) lighting to what would be natural (i.e. sunlit only).