We are looking to replace our two Panasonic TH-42PWD6 plasma TV's. We are currently using them for video conference and power point presentations. The video conference system that we are using is Polycom so I need to make sure they are compatible with that. The new TV's could be bigger in size than a 42", we could go up to 50"-56" range. Any suggestions on replacements. They do not have to be Panasonic. I am not an expert on this and if anyone has any questions I'll try and answer them as best I can. Thanks