I've just gotten into classical sequences myself and this is the feel I'm working towards. Good movements, transitions and added melodies. I honestly haven't heard the original but I can tell you've built on it.
I have to agree with Dr. Rod. Some of the instruments (especially the brass) sound a bit too sythesized. It seems to me, mixing-wise, less low and high end would serve this piece better. Classical instruments already lend themselves to the high and low. The mid is the tricky part not to drown out. What program did you use? I've been experimenting with a Garritan Personal Orchestra plug-in for FL Studio but I'm not sure this sythesis is the best. Perhaps using a different sequencer or sound source would be better.
Well, there you have the opinions of two doctors, heh. Hope I've helped at least a bit. Keep at it!
