Yes, I know, they're cheesy in the extreme and not even actually from Siberia, but Trans-Siberian Orchestra's jolly blend of electric-guitar shredding and Christmas music is like the flu: It comes around every year and it's extremely catchy. That being said, if I'm going to be afflicted with pinch-harmonic-inflected cheer, then I'm at least going to focus on the upside. Which is, TSO formed from the remains of the excellent and under-appreciated power-metal outfit Savatage, whose interpretation of Edvard Grieg's "In the Hall of the Mountain King" probably sparked the whole classical-music-meets-metal fad. Now if only they still had Alex Skolnick from Testament in the band.