There are a lot of big developments in the TV arena at the moment, I would suggest that now is not the time to be putting a lot of money into a new TV.
OLED technology is coming through nicely, the battle of which HD standard(720 or 1080) is still ongoing. power consumption is still a problem for a lot of manufacturers(lots of heat for your big ellecy bill)
If you feel you must then I believe Panasonic/Toshiba get good reviews, check out the forums at
http://www.avforums.com/
Hope this helps