Holy shit, this is awesome. Production is meh, but I LOVE the arrangement, and I normally don't like orchestral arrangements.
There are some points where the samples work relatively well, but still, if I were a judge, I would give this a NO solely on production.
See what you can find in the way of samples, but also check out zircon's real instruments tutorial.
EDIT: HOLY SHIT! You know what else you could do? Talk to trenthian. I know at one point he had an actual orchestra at his disposal for remix performance; I don't know if that orchestra is any good, or even whether the option is still open, but it's definitely worth looking into.