No matter if its LCD or Plasma. . . I saw a milking Wal-Mart and had a 50-inch HD Plasma TV 1080p for 798. . . someone can find something similar or lower?

Ok, I think buying a TV screen Store (to be checked first, of course), a 52-inch HD LCD TV, the brand is strong.
Price range 700-900.
Is this a good deal with the current market?

My father has just bought a HDTV 720p, 1080i 52-inch LCD Sharp
I want to play my 360 on it, because every game looks fantastic with HD
I heard that video games many wounded Plasma TV
because it is a liquid crystal is acceptable to play my 360 on it?
thanks