restragled....I have Saint Saens' Aquarium right on my desktop. I especially like the surf rock version that used to give Space Mountain a real spacy feel.
My favorite semi-classical work is, of course, the Carmina Burana (Carl Orff). In high school, I memorized a good chunk of the Latin lyrics. My favorite pieces in it are the "Ego sum abbas" one (great comical effect), "Circa mea pectora," the exquisite "Ave formosissima", the fun "Tempus est iocundum," the elegant "Ecce gratum," and of course the bombastic "O Fortuna" that is unfortunately bastardized in almost every damn movie trailer.