LCD vs. PlasmaTV's

I would like to get some input about the advantages of LCD (flat screen panels, NOT projectors) vs. plasma TV's or monitors. I am really not interested in HDTV formats as a priority. I've heard negatives about "pixel burn-out", problems with use in higher elevations (above 6000 feet), as well as problems in extremely dry or humid climates. Also, what is the largest screen LCD availible? Thanks!