Since arriving at the Minnesota Orchestra nearly nine years ago, Osmo Vänskä had taken the longtime ensemble on quite a musical ride, exploring fresh corners of the canon, introducing new work, and forging a signature bond between the local ensemble and the music of his native Finland. That includes a current project to record all of Sibelius's symphonies by 2015, the sesquicentennial of the composer's birth. Vänskä and the orchestra also continue to be committed to new work, or new ways to bring it to the stage. At the end of the March, there was Arcadia, a brand-new piece by Judd Greenstein that was funded by hundreds of contributors. That dedication to exploration makes the Minnesota Orchestra one of the great artistic treasures of the Twin Cities, and all of that starts at the head.