Solid! I love the crunch in the percussion that that kick introduces, fits perfectly. It all reminds me of the Sands of Time game soundtrack, in a good way.
Have you heard of exciters? If you wanted a simpler kick with more impact in the higher end, it might be the way to go if there's absolutely nothing there to boost with an EQ. Also try reducing the predominant frequencies in the sample, and raising its level overall - it'll pop out more, though there might be things there you don't like. If you already tried that, my apologies :3
The strings were clashing a little with some of the counterpoint introduced just after the 1 minute mark, because the release time was longer than on the brass. I normally love well-used dissonance, but it felt more like a mistake here. This was what brought it down the most.
Your mixing... I might take a rather different philosophy towards this than most electronic artists so take with a grain of salt - I would rather something sound brilliant on one output format than risk losing out on the full impact of the song by cluttering it or reducing it to something less than it was. On monitor headphones, this was more on the cluttered end for me (too many instruments using the same ranges), but overall I could tell it was nearly there!
But for instance, listening to classical in a car stereo system, and then with even just cheapo dollar-store headphones, it's an entirely different world, because there is no compromise on the headphone mix - their typical audience, along with quiet home setups. You get every instrument involved, and can gauge the entire performance rather than rely on raw volume and the listener's imagination.
There's something to be said if you can accomplish both - put in complementary details that don't fight when heard together on higher quality equipment. Then you've just made a better song. I think it's better to go the other route if you can't find elbow-room, though, towards simplicity when clarity would be compromised by doing too much to win over everyone.
Side notes: always keep track of who exactly provided your samples, and give more specific credit even if they don't ask for it. It's a professional courtesy if they're releasing it free to promote their work, or at the very least it's nice if they're just doing it to be nice as well. And sorry if this was too long, I got carried away like I usually do when writing ^^;