Well how far is your normal viewing distance going to be from the TV? What will you be using it for? More than likely a 40" would be just fine but you may be able to go with smaller depending on how close you are sitting and what you are watching/doing with the tv.
To get the full benefits of 1080p at 8' a 61" screen would be needed.
Load of boloney. What "full benefits"? 1080p is twice as many pixels and it shows immidiately as soon as you got a good source and as soon as you hook up a media PC or a game console.
Also, people who equate line resolution of a human eye with a need are cracking me up. They do not understand the basics of signal processing - sampling rate may intorduce noise well below the maximum resolvable rate. That's why 96K sound is audibly better then the CD rate, even as your ear can not resolve the frequensies above 20K. Those HD"guru" punks are just justifying their plasma habits with some pseudo science mambo-jumbo. (I am not knocking on plasma, resolution is not the only thing)
Just look at any text (or other high frequency signal - sharp transitions in the case of 2D signal) on 720p vs 1080p - you will see the difference, even if it is not visible in movie content.
40" is fine - maybe you will need to crank up text size a bit if you want to browse web on it though. I am doing that on a 40" right now, but will go up to 46" (movies are on 50" plasma - sweet spot nowdays I would think)
I think the size is perfect. Some friends have seen it and said man thats huge! But I think it is a good size for the bedroom.
That's what she said!!!
Actually for the size of the room and the distance you will be thinking the above with anything over 40" diagnol. If you can afford to get the 42" or 40" then by all means go for it as you will not be disappointed. Depending on what you do with the TV will warrant more whether you should go 720p vs 1080p. But as one of my friends told me when I was in the market, it is better to spend the extra money and get the 1080p if you can. That way when the HD war is done you will have the availability for it. Future proofing yourself for an extra couple hundred dollars now can save you some in the long run.