Hello, videophiles. I'll soon be purchasing an Xbox 360, and I'm looking forward to playing HD games on my computer monitor. I recently learned that the Xbox 360 cannot automatically letterbox content, and that some games will scale up no matter what, so I now have some interest in locating a tuner or adapter that would, in essence, let me use my LCD monitor as an HDTV. How much would such an adapter cost? Am I better off just buying an HDTV?