The way the engines stick out on the back, I'm not a fan. Especially if you look at the bottom ones, you clearly see the overlap and that is a big no in my opinion
Also smooth it before you texture, see if you're happy
There is something you will have to do before texturing.
-Detailing: You already made what it looks like a basic mesh; no utility parts on the hull, basic weapon platforms that look like it was placed/ slapped on, the engines itself need to look like it is blending in with the Root of the mesh, ETC.
-Clean-Up your mesh (any excessive or unused vertices)
-Smooth Grouping
I do agree with Lucas about the engines and I was generous about it before. You came far with it, might as well finish it properly.
