With the New York Philharmonic set to take up residence in Carnegie Hall, the nation’s premier presenter of touring orchestras is set to gain the services of one of the world’s most well-known orchestras, and lose a lot of its scheduling flexibility. Some observers are worried that Carnegie’s famed schedule of touring orchestras, featuring perhaps the finest annual array of ensembles anywhere in the world, will have to be drastically scaled back to accomodate the Phil. Carnegie Hall execs insist that they can be both a home to the Phil and the top presenter of out-of-town ensembles, but many have their doubts.