I do agree with the sentiments to date. The ship does look a good deal like an over-sized "shoot-em-up" fighter from the arcade games of the 90's.
If I was to alter the design, I might suggest accentuating or pronouncing the depth and volume of the undersides of the ship - the dorsal profile of the craft should remain fairly smooth and low profile, though the addition of turbolaser blisters and some additional greebling would be appreciated.
Apart from bowing out the underside, I'd suggest smoothing and detailing the wings. This will help migrate the model's appearance away from someone's reimagined fighter concept to that of a larger ship. In this regard, you might reference the Mon Calimari ships, within reason of course.
*EDIT
I'd also suggest keeping the upper surface as smooth as possible, reducing the prominence of the breaks in its surface where able. Any sharp lines and high altitude greebling should be restricted to beneanth the hull, with the exception to the exposed engine machinery above and below the hull.
