a few areas to consider....and may be old news now, but check

- off angle viewing, plasma is typically better
- fast action (sports), plasma is great, older LCD's were not as good, newer ones are pretty good
- games, plasmas can get burn in, LCD won't
- some plasma screens reflect more glare

- size - A friend said, when in doubt, go big. I was looking between a 50 and 58. We got a leftover 58 on the net for about the same price as a new 50 and are glad we did.