The modeling looks pretty solid. I think you went a little overboard on the paneling, its messing with the iconic red stripe a little too much. Normally when the stripe is broken up its because of wear not because of paneling breaks. The nose of the xwings in most depictions are pretty smooth.
ah this brings back memories. your low poly surely has more polygons than the high poly xwing i did in '95 :P personally i like it dirty and desaturated, but if you wanna capture the movie's style, yeah you gotta do what the previous guys said. great model dude!