Spiffyness. A faboo collection of just about every variation of the Doctor Who theme that’s been officially broadcast. It’s interesting all the variations on the original Ron Granier music that have taken place — some of them frankly, pretty awful. (For the record, I love the current Murray Gold incarnation of Granier’s theme).
Here’s a nice collection of Doctor Who sound effects and dialog bits.
And for more history on the themes (not including the current mix or the ’96 movie), here’s some great historical narrative.
Speaking of Doctor Who coolness, may I recommend the online documentary Planet of the Doctor? It’s worth a look-see.