If you are looking to stream video, music, and photos from your PC to a TV and are concerned about some of the drawbacks of the Microsoft Media Center edition software with Media Center extenders then the Buffalo LinkTheater could be the answer:
Unlike a Media Center Extender it supports all popular video formats including Xvid and DivX (allowing much smaller files sizes).
Unlike a Media Center Extender you can stream HDTV (720p and 1080i).
Unlike a Media Center Extender the LinkTheater has a built-in DVD player.
The downside to this extra functionality is that the LinkTheater isn’t designed to talk to a media center PC so you can’t browse TV listings, watch live TV, or schedule recordings.