Hello, I just bought the NW-HD5 (being shipped) and I was wondering if it was better to convert my songs to ATRAC3Plus or MP3. From what I read and what I've heard ATRAC3Plus has a sonic advantage over MP3. I'm trying to maximize the amount of songs I can put on the 20 gigs without losing sound quality. I was thinking to use ATAC3plus 64kbps. I'm open to your suggestions. Thanks!