WOT TV & SCREEN........... DEFINITIVE ANSWER HERE
I work for Hitachi home appliances & I have been mucking about with this type of stuff for the last 11 years so......
I've just got back from 4 days training in Japan on this very subject, and therefore think I can offer a pretty sure answer to your question... These are my personal opinions based on my experience and knowledge of the subject. I'm sure there are people out there who may agree/disagree with my statements, but remember, this is my personal opinion.
Plasma screens:
If you want size over quality, plasma is your best bet. However, the screen resolution on bigger panels is poorer due to the pixel width being upwards of .9mm pitch (pixel to pixel). The sub-pixel pitch is poor at .6mm and therefore the whole image will appear grainy in panels over 42" wide.
37" Panels and smaller are better in that the pixel width is reduced (around .7mm pixel to pixel) and therefore the sub-pixel width is better - hence a more difinitive image.
Most PDP's are now coming standard with 720p or 1080i HD formats - but be careful what you buy. Make sure the panel itself (not the inputs or tuner module) is HD compliant - i.e. the panel should be 1080i compliant (XGA or higher resolution - 1024 x 1024 res or 1366 x 768 res). Anything less than that and it's VGA and therefore not able to display true 1080i resolution/formats - even though the tuner/input module accepts HD format inputs! You see, the formatter PCB inside the unit will de-construct the HD input and covert it to show 420p (Standard definition) on the panel.
So make sure any PDP you buy is fully 1080i compliant i.e. the panel as well as the tuner & input module.
As for the gas leaking and shit like that - it's a non-issue. Don't get overly wound up about the panel leaking gas - it's bullshit and a VERY rare occurrence.
Image retention in Plasma is an issue - only if you keep watching the same image or channel for a very long time i.e. the 'Sky' logo on the news channel may become burned into the panel if you watch 100's of hours of Sky News etc... If you constantly watch DVD movies in the 16:9 format and do not zoom the image to remove the black bars on the top and bottom of the screen, you will eventually see these bars as 'ghost' images in the future.... There is a 'Screen Wipe' function on most good models which help to reduce this effect.
LCD TV:
This is the Johnny Bollocks of TV/Display panels!!! Fecking brilliant technology :yo:
I would buy one of these over Plasma any day......... Why?? Resolution & contrast ratio. To explain:
LCD technology is able to produce a much higher pixel desity per square inch of display space - thus a much higher image resolution is achieved. Simple.
The latest Hitachi LCD TV - 37LD8800 series - is a beautiful piece of work! It is fully HDMI compliant with full 720p & 1080i resolution all the way to the panel. The contrast ratio is excellent while the viewing angle is now 170 degrees horizontal. It can reproduce colors well into 6 billion and over and therefore gives a true rendition of lifelike colors.
LCD does not suffer any image retention problems - and if slight image retention is noticed, it can simply be erased by watching another channel for a few minutes.
In my opinion:
If you want quality over size - LCD is the only way to go.