Ben Zander is totally nutter, but I think he's awesome anyway. Listen to this only once or else you'll begin to notice how terrible the playing is. Still, pretty exciting.
Go to 33 minutes in for Nimrod from Elgar's Enigma Variations. Go to 37:50 for what's probably my favorite encore piece of all-time, the orchestral arrangement of Abreu's Tico Tico, done as I've never heard it (in the awesome way). This might even put Dudamel and his Venezuelans to shame.