'Tis the season for Christmas music, and if you haven't yet gotten your Messiah on, The Apollo Chorus will be mounting a pretty fierce production featuring uber-tenor Cal Metts and the stellar Ellen Hargis. Written on notoriously short notice, Messiah incorporates several tunes from Handel's Italian period, which are available on a cd featuring hottie baroque coloraturas like Veronique Gens and Patricia Petibon.