The new catalog shows a 'Standard' 50 inch Full HD LED TV for $555, the only 'extra' I can see is it now includes that 'Audio Return Channel'.
That's around $200 cheaper than it was when I bought mine 2 years ago.

Also listed is a dividable Sound Bar that allows it to be used either across the front of the TV or be split into 2 and stood vertically beside the TV.
There are some other items on the next page of the catalog that might be of interest to some.