I like this ship, and those specualars are stunning. They give the ship a sort-of glossy metallic quality. I would comment on the blue nacelles, but you already said you're going to be chaning them.
The only thing I, personally, would do is raise the Nacelles to be in line with the saucer. But that might make it too simmilar to the Yorktown from legacy? Either way, I'd like to see this ship when it's complete.