The Pro comes with a 20GB hard drive, a wireless controller, and...drum roll...HDMI! However, although component video cables are included, HDMI is BYO. (Meritline, always a good source, has a 6-foot HDMI cable for $4.99 shipped.)
The 360 is not only a killer gaming console, but also a damn fine media center extender (meaning it can stream music, videos, and photos from your PC).
It also lets you stream movies from Netflix, though for that you need both a Netflix membership and an Xbox Live Gold account.
Buy.com doesn't specify the warranty (which is weird--it's not like the company's new at this), but it's almost certainly 90 days. Hey, that's the "cost" of getting a refurb on the cheap. In this case, the really, really cheap.