I went LCD. Here's some cut-n-paste, if this helps you decide:
From Wikipedia:
Plasma display advantages and disadvantages:
Advantages
* Slim profile
* Can be wall mounted
* Less bulky than rear-projection televisions
* Produces deep blacks allowing for superior contrast ratio
* Wider viewing angles than those of LCD; images do not suffer from degradation at high angles unlike LCDs
* Virtually no motion blur, thanks in large part to very high refresh rates and a faster response time, contributing to superior performance when displaying content with significant amounts of rapid motion
Disadvantages
* Heavier screen-door effect when compared to LCD or OLED based TVs
* Susceptible to screen burn-in and image retention,nowadays most recent models have pixel orbiter
* Phosphors lose luminosity over time, resulting in gradual decline of absolute image brightness (newer models are less susceptible to this, having lifespans exceeding 100,000 hours, far longer than older CRT technology)
* Susceptible to "large area flicker"
* Generally do not come in smaller sizes than 37 inches
* Susceptible to reflection glare in bright rooms
* Heavier than LCD due to the requirement of a glass screen to hold the gases
* Use more electricity, on average, than an LCD TV
* Do not work as well at high altitudes due to pressure differential between the gases inside the screen and the air pressure at altitude. It may cause a buzzing noise. Manufacturers rate their screens to indicate the altitude parameters.
* For those who wish to listen to AM radio, or are Amateur Radio operators (Hams) or Shortwave Listeners (SWL) , the Radio Frequency Interference (RFI) from these devices can be irritating or disabling.
From VarTech Systems Inc.:
LCD Advantages
Brightness Produces very bright images due to high peak intensity. Very suitable for environments that are brightly lit .
Emissions Produce considerably lower electric, magnetic and electromagnetic fields than CRTs.
Geometric Distortion No geometric distortion at the native resolution. Minor distortion can occur for other resolutions.
Power Consumption Energy efficient. Consume less than 1/3 the power of a comparable CRT. Consume less electricity than a CRT and produce little heat.
Physical Aspects Take up about 40% less desk space. LCDs are thin and compact.
Screen Shape Completely flat screen.
Sharpness At the native resolution, the image is perfectly sharp. Adjustments are required at all other resolutions which can result in measurable degradation to the image.
LCD Disadvantages
Aspect Ratio The aspect ratio and resolution are fixed.
Black-Level Not proficient at producing black and very dark grays. In a "standard" configuration, not appropriate for use in dimly lit and dark conditions.
Contrast Lower contrast than CRTs due to a poor black-level.
Color and Gray-Scale Accuracy Color saturation is reduced at low intensity levels due to a poor black-level. Images are satisfactory, but not accurate due to problems with black-level, gray-scale and Gamma.
Cost Considerably more expensive purchase price than comparable CRTs . (Cheaper lifetime cost: lasts about 13,000 - 15,000 more hours than a typical CRT.)
Gray-Scale Have an irregular intensity scale and typically produce fewer than 256 discrete intensity levels. For some LCDs portions of the gray-scale may be dithered.
Motion Artifacts Slow response times and scan rate conversion result in severe motion artifacts and image degradation for moving or rapidly changing images.
Resolution Works best at the native resolution. The native resolution can not be changed. All other resolutions require adjusting procedures which can cause considerable deterioration of the image.
Viewing Angle Restricted viewing angles. Viewing angles affect the brightness, contrast and colors shown. Wide angles can lead to contrast and color reversal.
White Saturation Saturation and compression can occur due to the bright-end of the intensity scale becoming overloaded. Contrast control must be carefully adjusted.
Other LCD Characteristics
Bad Pixels Can have many weak or stuck pixels, which are permanently on or off. Some pixels may be improperly connected to adjoining pixels, rows or columns.
Interference May require frequent readjustments throughout the day due to timing drift and jitter. Analog input requires careful modification of pixel tracking / phase to decrease or eliminate digital noise in the image.