Looking sharp! I think I'd go for a stronger (more saturated) shade of blue, though. And possibly stronger shade of gold, too. That thing should look like it's literally plated with gold. Oh, and if you really want to go crazy with it, why not make the big glass ceiling transparent, and put a very simple mesh under it, to give the impression that we're seeing a bunch of tree-tops under the glass? That would be pretty fancy.
I think the really fantastic thing about the original, is precisely that it's so crazily distinct from other ships we see. There is no way in hell you could mistake the Twilight Purchase for a military ship. The difference isn't so huge that you think it's like an alien vessel or something, but the fanciness… well, I suppose ultimately, it's the difference between, say, Cunard's
Queen Elizabeth 2, and the Royal Navy's
HMS Queen Elizabeth.