It's weird that it's got those smooth parts up front, but the rest is rough. Also the blue on the engines is distracting. But other than that, it's pretty good. (though I don't know what the reference looks like, so maybe I'm just crazy.)
Babylon 5 is the best science fiction TV series (ignoring historical factors). Your destroyer is quite good, especially for such a complicated design. The proportions are just about perfect. If you are interested, check my site for my version of the Hyperion heavy cruiser.