I am in the market to upgrade my current hdtv. And was wanting some advice from you guys. I have purchased a lot of gear for my system based on your guys input so I value your opinions. I was lookig at a couple of different models. 1.HITACHI65XWX20B 2.HITACHI65SWX20B 3.TOSHIBA HDX82 4.SAMSUNG HLM617W I had a question, what is the difference between the two Hitachi's? Is the only difference the built in hdtv tuner on the XWX model? Or are the internals on the XWX model better? Better picture quality? Or the same? Thanks for your help.