It's great if you're using your computer as a Home Theatre PC (HTPC) and you're going to be using it on a TV. Then you can just go into the Media Center and use the remote to access the interface and your media. So if you're not really going to use it that way, I would just get XP Professional. Since you're using DJ programs (I'm assuming), it'll work on both Pro and MCE, but no use in getting MCE 2005 if you're not gonna use the Media Center.