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Flat LCDs are extremely popular in all screen sizes these days, thanks to competitive pricing and the fact they can fit just about anywhere. Larger LCDs–as high as 65 inches–remain more expensive than plasma and rear-projection models, but in the popular 40- to 42-inch size range, LCD prices have dropped precipitously. As of spring 2007, flat-panel LCDs in this size range can be had for as little as $1,000, pretty much the same as plasmas.

The picture quality of LCD TVs has historically suffered from poor black levels, but the latest versions are often much improved . The best LCDs actually surpass the best plasmas in terms of delivering a deep black, but most LCDs still lag behind. That’s because LCDs use a backlight to provide illumination, and there’s almost always some light leaking through the pixels. Color saturation is also generally inferior to plasma’s, again as a result of the inability to completely blacken (turn off) the pixels.

Viewing angle is another weakness of LCD compared to plasma. On every LCD we’ve reviewed, we witnessed some brightness and color shift visible when we watched from an angle that’s more or less removed from the sweet spot right in front of the TV (to either side, and especially above or below). Plasmas look equally good from very wide angles. In addition, LCDs are much more likely to exhibit uniformity problems than plasmas, which can appear as lighter areas on dark screens, clouding, or even color banding on some models. These can be more or less severe from model to model, so check the individual reviews for comments.

On the other hand, LCDs will generally have a higher native resolution than plasmas of the same size. This isn’t as big a deal as you might think because, in practice, it’s difficult for the average viewer to discern the difference between, say, a 40-inch LCD with 1080p resolution and a 42-inch plasma with 1,024×768 resolution, especially from normal seating distances (more info).

LCD spec sheets often talk about response time, but in our experience, almost all newer LCDs have adequate response time to deal with fast motion to the satisfaction of most viewers. LCDs also have a reputation for being brighter than plasmas, and while that’s technically true, most plasmas are plenty bright for even the most demanding high-ambient-light viewing. One definite advantage of LCD TVs, however, is that their plastic screens reflect less ambient light than plasmas’ glass, so they’re usually better for very bright rooms with little light control.

Some of the best LCD TVs:

Sony Bravia KDL-52XBR2
Sony Bravia KDL-46XBR4
Samsung LN-T4681F
Samsung LN52A650
Samsung LN-S4096D
Samsung LN-T4671F
Samsung LN46A550
Sony Bravia KDL-V40XBR1
Toshiba 52LX177
Samsung LN-T4665F