The Green Music Center is usually home to the Santa Rosa Symphony, but this week sees two visiting outfits. On Thursday, Jan. 23, the San Francisco Symphony rolls into the space with violinist Alexander Barantschik, who’ll perform Mendelssohn’s Violin Concerto in D Minor and conduct works by Mozart, Britten and Piazzolla. On Saturday, Jan. 25, Harry Bicket conducts the English Concert in Handel’s opera Theodora, featuring Sarah Connolly, Andrew Kennedy and others (7:30pm; $40—$85). Green Music Center, 1801 E. Cotati Ave., Rohnert Park. 866.955.6040.