In 2003 Mariss Jansons took over as chief conductor of the Bavarian Radio Symphony Orchestra and turned an already good orchestra into one of the finest in the world. Their 2005 CD of Shostakovich's 13th Symphony won a Grammy for best orchestral performance, and their latest recording, of his 3rd and 14th symphonies, is phenomenal, with stunning playing from all sections--the musicians' sound is remarkably well blended, and they show extraordinary vitality, finesse, and musical depth. Jansons developed his strong connection to Shostakovich while growing up in the Soviet Union, where his father was assistant conductor of the Leningrad Philharmonic under Evgeny Mravinsky, and the highlight of this concert is sure to be the composer's Sixth Symphony, whose long, grippingly dark first movement opens with a spectacular brooding melody. The Bavarians, making their first U.S. tour with Jansons, will also play Sibelius's Symphony no. 2. a 8 PM, Orchestra Hall, Symphony Center, 220 S. Michigan, 312-294-3000 or 800-223-7114, $35-$79.