Honestly, DLP projection with LED bulb is the way to go. I have a sony 60" SXRD XBR2 - There is no LCD or Plasma screen that I have seen that has a picture as good as this unit.
Unless the space that the TV takes up is an issue and wall mounting is necessary - there is no good reason to pay the premium for Plasma, especially in that size. I wouldn't want to have an LCD any bigger than 50/52"
That being said, the DLP units with LED lamps are very shallow.. even mine, which has a traditional bulb, is only about 12" deep (if that)
IE this samsung
unit