In regards to the hard drive thing- keep in mind that it is a 2.5" laptop HDD using SATA II for the hot-swappability. Not an overly cheap HDD, especially considering it comes in a case custom made for the XBOX 360.
For example newegg sells a HDD with the same specs but WITHOUT SATA for $66.00.
http://www.newegg.com/Product/Produc...82E16822146040