What HDTV do I buy!? LCD or Plasma and which model?? HELP!!!

Hi, I am trying to decide which HDTV to get for my home theater, I want to go really big (over 52"). I have done extensive research and have it narrowed down to the following choices, any opinions would be great:

Panasonic Viera TH-65PZ850U 65" Plasma.

Pioneer Kuro Elite PRO-151FD 60" Plasma.

Sony Bravia KDL-55XBR8 55" LED Back Lit LCD.

Samsung UN55B8000 55" LED Back Lit LCD.

Of course there is the issue of LCD vs. Plasma going on here. I have read reviews on all these TVs and they all get great reviews. If I walk into a store and look at them I can't really compare because who knows what inputs they are receiving. I understand that there are two different types of LED backlit televisions, from what I've heard the Sony looks much better than the Samsung. I would rather go LCD because I know the technology and like the fact that they are less temperamental. I know they fixed the burn in and also most of the common plasma issues they had when they first came out. From what I've heard the Sony actually compares well with the Pioneer and Panasonic as far as PQ goes, is this true? I like the size benefit a lot of the Panasonic and heard it is just as good as the Pioneer. What do you think? I want the best picture possible...