Can anyone tell me the differences between this set and the "regular" WX sets besides the cabinet and sound system? Are the differences worth the extra money? In the store (Circuit City), this set had the best picture of all sets regardless of price. I know that settings in the store vary and are juiced up, etc. And lastly, how does Panasonic's reliability rate against Hitachi (51s500) or Toshiba (51h83), my other two choices. Any help would be appreciated as money is currently burning a hole in my pocket and the Wife has given the green light.