Really nice looking - good job. I like both ships but would like an external look on the first one, so we can see what it looks like. The design of the second one (exterior) I think is a bit boxy, Yachts tend to be streamlined - it helps them look cool
concerning the font I don't see a problem with it, the text blocks are small and a non-serif font tend to give a more futuristic look. (then again, one could argue that when we reach that future we will have used grotesk fonts so much that serif fonts will be the font of the future *lol*) ... and midgarsormr has it right concerning the wings "Live long and prosper"