Well, the texture will liven things up quite a lot. The only suggestion I'd make for the model would be to have the wings a bit further forward, perhaps curving upward.
As for what little thing I would really like to see, a warp grill on either side of the tail fin on the top, kinda like the D'deridex class.
Since all I have in MS Paint and my hand to sketch with, if you gimme a good top view I can sketch what I mean.