You're definitely on the right track but I found the choir to be annoying and/or distracting after a while. It's pretty much there for a good portion of the piece. Many composers use choirs as the "icing on the cake" or the accents to really push the piece over the top. By having the ear exposed to the choir for so much of the piece, it begins to lose it's effect. Some of the strings and brass parts were really nice and helped create drama.

Good piece but very generic one. We hear this type of music everywhere.

Nathan is right. Choir should only be included to strengthen your accents. One more thing: your choir's notes are quantized too much. Some samples have bigger attack than others, you should move them left, each of them in it's own position.

Less quantization = less robotic sound :)