This is my first post. I'm a newbie, but reading these threads every day is a great learning device. I'm looking to acquire my first big screen and my first HD. I'm strongly considering the Toshiba 46H83 from onecall - $1350 shipped. Can anyone tell me in a nutshell the differences between the H series and the HX (Cinema Series)? Are those differences worth the price (approx extra $450)? I'd welcome any knowledgeable advice on really good RPTV's in the 46"-57" range. Thanks for all the help.