Hi Spooky123,
The HD box is definitely worth the upgrade if you like your movies and sports to be in high definition. I can see the massive leap in picture and sound quality. As they are discontinued, you find it hard to come by. Don't dispare though. I hear that a new box is on its way that will be geared towards 4k and / or 3D! Not sure when these are coming about or if they will have a record function too, but with technology, anything is possible once the right price for hardware is negotiated. If I heard more, I'll be sure to post on the forum.