I am getting ready to plunk down my 3-4k for the HDTV of my dreams and I have a question. All the 1080p sets are starting to come out I'm wondering if I should get one. I definately want true hd but is there any visual differance from a 1080i or even 720p set? I will be buying this television in the first week of June and it needs to be at least 56-62 inches, any suggestions??