Thank you for all the feedback.
I know the design right now looks sort of Federation'ish, but I plan on adding hull plating and the nacelles will look pretty vicious.
I reworked the top structure a little, lengthened it and added more detail. It has two shuttlebay doors. I also removed the blended rear, straight wing and extended it to compensate.
When it's all finished I'll take orthos and post them here for anyone to use.