I've spent all night tracking it down, and I think I've finally found the peice, but not the exact arrangement, and that almost bothers me more.
If KT still checks LJ, maybe she has some ideas. >..<
Anyway, to my anger and embarassment, it was some sort of arrangement of the March of the Kings. Why is this so shameful? Apparently it's Christmas music. I hate christmas music. With a burning passion. It's like my nemesis. I used to love the Carol of the Bells, but too many holiday seasons working in stores that insist on playing christmas music is awful. You die a little inside each time.
At any rate, I must have heard it before during the holiday season or somthing. It's not one I hear all the time, though, so I guess I never associated it with christmas. Unfortunately, I can't find an arrangement that sounds like the one I remember at all. This is probably the closest, just because the strings are loud and violent here. (I remembered it being a brass-heavy peice with a Q&A with the woodwinds, and a lot of really dynamic volume stuff) Maybe I played it in band or somthing. At any rate... somehow this conclusion is not satisfying in the least.