I thought it had a great \"sound\"production wise.
In particular I really liked the opening until after the buildup at :27 and the ending from 1;00 on.
I though maybe you could have that key change at :43 be different from the first in that section. For instance the first could be all winds carrying the melody and then bring it home with your brass section at the key change. I think that might give the middle section more build in dynamics. This is just an initial thought . It\'s nice stuff all around