Thinking about upgrading to a 720 projector. Anybody have any experience upgrading to the HD72 from the 4805?? I dont know if it will be worth it. Primarily running DVDs, with the now possible HD TV?? I dont think I will be able to preview these, as noone carries both in my area. Anybody familiar with both pjs. Both have great reviews, and I have been real happy with the 4805 onto a Dalite 106" screen. Total light controlled envirnment, dedicated room. thanks for the input in advance.