my 2 cents.
i did alot of research before buying my samsung 50 inch dlp.
720p is better for things that have alot of movement on the screen. for example, espn hd is broadcast in 720p. hbo hd is bradcast in 1080i. that and 1080i will be a standard for a long while as they companies try deal with bandwith issues and given the tv's around right now.
plamas for the most part have better and brighter coloers and support higher resolutions than lcd, dlp, rptv. the problem is they run into into others problems like heating, etc. it's true they do fade over time. if you compare an older plasma to a newer one you will see it fade over time. after so many thousands of hours it will fade. newer very expensive plasma now have a longer shelf life when it comes that problem but you will have to pay alot for it.
lcd's have all the problems people decribed above, although things like trails with fast movement and viewing black are also less and virtually unnoticable in newer more expensive models. you'll have to pay of course but it is thinner and lighter like a plasma, although the bigger the screen the closer they get to dlp size.
obviously im a little biased. my dlp supports 720p and 1080i. true hd broadcast look fantastic. the tv has a mode that will sort of brighten the screen if there is sunlight, if you want. i use a dvi input. has an hdmi input i don't use. manufacterers are moving towards hdmi as it allows them so basically have a protection (right now at least) for their hd content. it's about 60 pounds,50 inch, thinner than crt's, a little chunkier than lcd's. for the quality of the picture and the price compared to other tv's like lcd and plasma and weight and size i got this. i'd have to spend much more on a tv with similiar "quality" and longevity. even if i have to spend 80 bucks replacing a bulb in about 4 years.
yes monster cables a rip
heinrich: i'd get one with a dvi input. same quality and cheaper than hdmi, also i'd find outhow well it handles fast movement.