When the Colorado Symphony hired 47-year-old Jeffrey Kahane to succeed Marin Alsop as music director, it signaled a distinct change in the way the orchestra will present itself to the community. Alsop was a virtual unknown when she came to Denver, and as her star rose in the wider music world, the CSO’s name came along for the ride. But Kahane is no up-and-coming youngster: he’s an established name in the industry, a much-respected pianist, and an artist in the prime of his career. Those may seem like excellent reasons to hire a music director, but at a time when so many other orchestras are looking for the next big thing in conducting, Colorado seems to have made something of a safe choice.