I have a Sandisk MP3 I bought a year or so ago and I have really liked it, but now I am ready to upgrade. I have one main priority. I want to be able to organize my music by playlists and be able to pick and choose from those playlists when I playback the music. For instance, I have certain songs I listen to when I work out, songs I like to listen to in the car, songs at night when I am winding down. I don't want them to mix up, I want to be able to play each "folder" of music individually. For example, I don't want to listen to my workout music when I am getting ready to relax! Can you recommend the best player to accomplish this? I would like to stay in Windows format, I don't really care for ipods. I use Media Player to download/rip/organize music. Any recommendations would be welcome!