From a shopping guide in our local newspaper:
Plasma- Boasting big,flat,lightweight screens,plasmas have a clear edge over LCD sets. Downsides- reflective screens (an issue in sunny rooms) and brightness, which can fade with use.
LCD- Flat, lightweight screens offer sharp images, rich color and attractive prices. Manufacturers insist current sets offer better off-center viewing and less blurring in action scenes than prior generations.
Projection- Boxy like traditional sets, yet thinner relative to their screen size, come in two flavors: (1) new lightweight microdisplays that use digital technologies and cost as much as flat screens (2) bulky, tube-based displays. Neither earns Best Picture honors.
Tube sets- Great picture quality, low prices and time tested technology, the old fashioned CRT (cathode-ray tube) remains a bargain, with many choices.
My Sony is of the latter variety at 34". But boy is it heavy. It weighs about 200 lbs. and takes two people to move it.