Williamette is right - to a degree. Along with burn-in, glare was another widespread issue with plasma sets due to the glass screen they use. However, as with burn-in, this problem has for the most part been fixed - many plasmas from higher end manufacturers come with an anti-reflective coating on their screens which SIGNIFICANTLY reduces glare (I have an overhead light and a lamp directly in front of my plasma - a TCP42G25 from Panasonic - and glare is essentially a non-issue even when both are on).
As for the other points he brought up, yes, burn-in has been pretty well fixed in the past couple years with the introduction of pixel orbiting. You'll still get some image retention after extended viewing (also known as ghosting), but it is always temporary and generally disappears after 15 - 20 minutes of watching something different. Oh, and the "ghosting" is typically only visible on bright white screens, so more often than not you won't even notice it unless you're actively looking for it.
Williamette also mentioned colors - due to the technology present in plasmas, they are able to provide much deeper black levels than comparable LCD and LED televisions. This in turn not only makes the blacks themselves richer, but makes all of the other colors on screen appear richer due to the higher contrast between the blacks and other colors.
Other advantages to buying a plasma include:
- The standard 600 Hz refresh rate each provides, meaning there will be less motion blur than comparable LCD and LED sets that are only capable of 60, 120, or 240 Hz.
- Command lag is less prevalent in plasmas than it is in LCD and LED sets.
- Guaranteed 178 degree viewing angle, meaning the picture will NEVER look faded no matter where you sit - some LCDs and LEDs (though not all) still have this issue.
- More economical due to necessity of competitive pricing - many people are still afraid to buy plasma because of all the issues that used to plague them until just recently.
My personal recommendation would be a Panasonic set - the current leader when it comes to quality of plasma televisions - and the one you should get depends on what features you're looking for it to include.
TCP--X3 - a vanilla 720p set, at a great price.
TCP--S30 - a slightly higher price, but is capable of 1080p resolution in addition to the internet features it provides.
TCP--ST30 - yet again a bit more costly, but is also capable of 3D in addition to coming with a wireless adapter for internet use - the S30 requires a separate purchase of one for around $80.
TCP--GT30 - once again a bit more expensive, but has a greater contrast ratio, additional HDMI, USB and other such ports, and is THX certified, in addition to all of the previously listed features.
For size, simply replace the dashes (ex. TCP42X3 - available sizes include 42, 46, 50, 55, 60, 65). After that, just look them up on a review site such as CNET for more information.
Hope it helps!