Wow, nice texturing job!
The model could use a few aesthetic changes, but as markyd pointed out, since you've already mapped and textured her, it's a bit late to be asking for feedback on the design (unless you're planning to make a new version, of course).
Personally, I like the nacelle pylons and sensor pod a lot. They look very elegant, and fit perfectly with the style of the era. The saucer is very nice, as well. Something doesn't sit right with me about the nacelles or the rear section of the main hull, though. I think it's the orientation of the nacelles, and the semi-random blocks on the rear of the main hull. I'd also do something with the rather empty top of the main hull. But other than that, I like this ship a lot!
Nice job.