I originally planned on buy one of the new Sony WV 600 series HDTV. This one supports both 720p/1080i. The toshibas and Mits models they sell at Best Buy only support 480p/1080i. Does this mean all video broadcasted in 720p will not be viewable on these two models? Or will it be downgraded to 480p? I want to watch everything in the best possible resolution, so is paying an extra $800 for the Sony worth it?