At larger sizes, plasma is CHEAPER. LCD has advantages over plasma in they don't have burn-in issues and are supposedly more durable. But, LCD also doesn't have as good a contrast ratio and in the past they could not refresh as quickly, which makes moving images not look quite as lifelike as plasmas. Plasma has some performance advantages, but they also have issues with screen burn-in and their long-term durability is somewhat iffy. But, for now at least for sizes 42" and over, they generally have better picture quality and they're cheaper than LCD. That could change a lot in the next few years though because it seems that LCD technology's advancing a lot faster, and I've read some articles that feel that plasma's an interim technology. Supposedly, plasma reliability is improving and the prices are due to take a tumble as new production capacity overseas comes online.