Austin Symphony Orchestra draws inspiration from “the special relationship” for an across-the-pond-and-back performance featuring four composers – two American, two British. Austin’s own preeminent pianist, Anton Nel, opens the program with Benjamin Britten’s Piano Concerto, Op. 13. Also on the bill: American Samuel Barber’s aching “Adagio for Strings,” Brit Ralph Vaughan Williams’ Serenade to Music, and American Leonard Bernstein’s Chichester Psalms, performed in collaboration with Chorus Austin. – Kimberley JonesFri.-Sat., Feb. 9-10