I am in the same boat as you and have decided to wait and see what the new Vizio 72" panel looks like in person. http://www.vizio.com/news/VIZIOLaunchesNEWXVTProSeriesofAdvancedHDTVTechnology/
Buy LED, LCD or Plasma
Going for a new TV. Any hints, warnings or advice? It will go over the fireplace instead of the rug there now.