I currently have a Sony LCD rear projection 720p HDTV. I'm seriously thinking of upgrading to a 1080p set (either a Panasonic plasma or the new Sony LCD flat panels coming out starting this month). Would I notice much of an improvement on 1080i shows? Conversely, would 720p shows look worse? Any other pros/cons? I'm trying to decide if spending over $2000 is going to be worth it. I can just hear the wife now "I can't tell a difference. Why did you have to get this new TV when the other one was only 2 years old?"