I'm trying to be better organized with my music on iTunes and I am wondering if when my iPhone 4 arrives, can I just sync my playlists instead of my entire music list? There's a lot of stuff there that is my wife's and I'd rather not have it on my iPhone unless I really have to. I know, I should probably know the answer since I have been using iTunes for almost 5 years now. I have my music categorized in my playlists and just need them. Thanks!