1. Robert SpanoFebruary 23–28 at Lincoln Center; 212-875-5656 or nyphil.orgThe Brooklyn Philharmonic’s former music director, now at the helm of the Atlanta Symphony Orchestra—insiders say he is on the short list for the big Chicago Symphony job—conducts four concerts with the New York Philharmonic.2. Michael ChristieFebruary 25 at BAM, 30 Lafayette Ave., nr. Ashland Pl., Fort Greene, Brooklyn; 718-636-4100The young gun who recently replaced Spano leads his first Brooklyn Philharmonic concert, with dancers onstage for Orff’s Carmina Burana.3. David RobertsonFebruary 25 at Zankel Hall, Carnegie Hall, Seventh Ave. at 57th St.; 212-247-7800A regular guest conductor at the New York Phil, who begins an official three-season engagement there in the fall, leads a group of young musicians, after a weeklong workshop. His wife, pianist Orli Shaham, plays too.