Advantages of XP media center?

Im in the market for a new laptop and i notice that the laptops that come with the media center are like $500 more than the ones that come with the home edition XP. Why is it so much more?

Also..do any of you guys have the Satellite P25-S509 Notebook...thats 1st on my list...thanks.



http://www.compusa.com/products/product_info.asp?product_code=306199&pfp=cat3

ttt