B-Xalted! was formed last December by author Barbara Gowdy and publisher/editor/musician Whitney Smith to dive into Handels Messiah. In its third presentation, Simon Walker conducts some of the choirs most beloved pieces, from the medieval carol Gaudete and Vivaldis Baroque Magnificat to works by Rachmaninoff, Vaughan Williams, and Canadas Rob Teehan and Stephanie Martin. 8 pm. $35 for reserved seats $25 general admission, $15 underemployed.