The Boston Symphony Orchestra is up and running and sounding very good after its holiday time off. New York Philharmonic music director Alan Gilbert opened the winter season with a concert series beginning January 10th. Best of all was the opening work, Henri Dutilleux’s Métaboles of 1965, a piece in five movements played without pause for large orchestra, with much brass and percussion, harp and celesta. The piece is listenable and attractive, rich and serious, and full of musical wit. It asks and rewards an audience’s focus and concentration, which came about well on this occasion. The presentation made a case for what has often occurred to me, that challenging or relatively new work often goes over best when placed first on a program — people tend to be fresh and attentive and open. Métaboles proceeds by constant change and transformation of basic material, and one finds oneself every few minutes, taken unawares, as it were, in quite new territory — a new realm of orchestral color, of breadth of phrase, of rhythm — all of which has grown seamlessly out of what proceeded. The music sounds at moments like Messiaen or Stravinsky, but moves with the mercurial quality of Elliott Carter, or Mozart. Gilbert and the orchestra put the work across with freshness and commitment.