I really like it -
I think it's very strong harmonically, especially in the A section. None of the melodies really drew me in, however. I really liked the rythmic motif of two sixteenths followed by an eighth - I though it helped draw the piece together. I couldn't quite get a grasp on the fanfares at the beginning and end - they seemed unnecessarily dissonant. The A section was my favorite - there was good interplay between instruments and a good driving force through the whole thing. The B section didn't keep my interest as much - It didn't seem to develop very well, but I've always liked bangy parts better than calm parts. I liked the buildup back to the A section, and I thought the rhythmic buildup to bar 169 was very cool. I'm not sure why you marked the strings detache at 169, maybe I missed something earlier.
Having been rather critical up there, I should mention that it's way, way, way, better than what I could do. Overall, I though the piece was great!