If you're looking for melancholy, I suggest Everything Beautiful by Samuel R. Hazo, or October by Eric Whitacre. If you're looking for excitement, I suggest Arabesque by Samuel R. Hazo or Equus by Eric Whitacre. If you're looking for the perfect mixture of both, there's Jupiter, The Bringer of Jollity (The Planets Suite) by Gustav Holst. All of these are played by symphonies, except for Jupiter, which is played by an orchestra.