Very nice! Just a couple of things I'd like to point out just to help improvement
The background, pretty but you can see the pixilation - although it's very hard to get a decent "real" space background these days.
Also, the Minbari Flyers skin looks a little... odd. It should be shinier - I suspect whats causing that is the beams it's firing, it just looks a hell of a lot different from the fighter when in reality they are both the same color (as I recally).
And it might be slightly better if the beams glowed a tad more... but that's just getting picky. It's a really great render
