I always thought Microsoft overpriced their add-ons. For example a wireless adapter is $100. I could get a usb one for a pc for $20. For the price of their 120gb hard drive, I could get a 750gb internal one. I don't see how that is a good deal.
Edit: Oh and I also don't see a benefit in 4 skus.
Edit2: http://www.newegg.com/Product/Product.aspx?Item=N82E16822148298 750gb hard drive.







