For the past few weeks it has been freezing randomly, skipping during songs, having strange screen issues and acting like it is in its death throes. Since I will likely need to replace it soon can someone tell me which of the current iPods has the best sound reproduction? I really don't need the large capacity of the Classic any longer so I'm open to any of the models, but I want to get the best sounding unit I can. Thoughts? Suggestions? Thanks!