I bought my xbox when it first came out and it sadly had a Thompson dvd drive. After the first six months it started giving me problems such as the dirty disk errors and your xbox needs service error. I opened up my xbox and took it apart and put it back together. It stopped giving me the messages for a few months but then started up again. I repeated the process and it kept working until about a week ago. I decided to purchase a new xbox but before that I wanted to ask some of the xbox geniuses if they knew anyway to determine which dvd drive is in the xbox before I purchase it. I am shooting for a samsung because it is supposedly the best. Please help me!!!