Alright I wasnt going to post here but since so many of you are telling Sharp incorrect information I figured it was time to step in lol. Now by no means am I saying any of your suggestions are wrong. In fact I'm not even going to suggest either one. I sold TVs and serviced them for quite some time up until last year when I changed occupations.
Myth #1:
Plasmas dont last as long as LCD's. <<<< FALSE
In fact most Plasmas and LCD now-a-days have then same MTBF of around 50,000 to 70,000 working/viewing hours.
Myth #2:
Plasmas are more expensive. <<<< FALSE
Since LCD's were originally made in smaller sizes, making an LCD in a larger size isnt very easy (or cheap) for the manufacturer. LCD's in the 37-47" range have dropped price quite a bit recently but plasmas on end are usually cheaper for the same size since plasma displays arent made in sizes smaller than 37 (and you can only find those in business applications). When you hit the 50"+ range LCDs are more expensive w/ comparable plasmas on average.
Myth #3:
Plasmas Burn in <<<< True (but very hard)
Yes, Plasmas do burn in and 1st generation plasmas did burn in relatively quickly (2-3 hours of a static image). Newer plasmas take 10+ hours of a constant static image to burn in the picture and just about every plasma now has many safegaurds against that, most have a slow image displacement that doesnt keep the same pixel always lit the same, there are many other screen saver types out there. Wouldnt recommend for extended PC use, plus most dont scale the desktop well unless you get a 1080p Plasma.
Other bullet points:
Yes most plasmas do have a glare due to the reflective outter glass. With the only exception being Panasonic who just came out w/ some 1080p plasmas w/ an anti-reflective coating on the outside.
Some LCD's do have a small Viewing angle problem by comparison but it is at a very radical angle. No one would want to sit at that angle to begin with.
Plasmas do have better Blacks (contrast ratios) but LCD's usually offer better detail (except for 1080p plasmas where its the same). LCD's do use MUCH less power than a plasma, especially the newer ones backlit by LED's which also means some even thinner/lighter LCD panels.
Most LCD's dont scale 4:3 Standard Definition pictures as well as most plasmas. Thats because LCD's look best when its a 1:1 Native ratio (screen's physical pixels matches the input's pixels). With the exception of 1080p (1920x1080), most plasmas have an odd pixel count (1024x768, 1024x1080) which means that the 640x480 lines of SD tv broadcast dont have to scale as much as they do w/ a standard 720p LCD (1366x768, 1280x720)
It all depends on how much you want to spend, how far away you sit (like frank said about screen size), what you plan to use it for (SDTV, HDTV, PC ect.), how bright your room is ect ect.
For anyone who thinks that what I said was biased, I have a 47" 1080p Toshiba LCD in my window covered living room hooked to HD Sat and a 42" 1024x1080i Hitachi Plasma in my much smaller, barely lit bedroom on SD Sat w/ my 360 hooked up. Both have pros and cons and work better in one situation than the other.